Past Papers Mat KB 2

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Composed and Compiled By

Fayzan Ahmed P a g e | 1

B.S/M.Sc Physics. Position Holder UoK. Contact : 0332-3279397

Kanwer M. Nabeel

M.Sc Physics, UoK. Contact : 0345-2524293

MATRICULATION

Past Papers (2013-1993)






Kanwer M. Nabeel


X – Physics Karachi Board

Practice material from past papers

Chapter – 1 : INTRODUCTION TO PHYSICS

1. The word science means to know

2. The first ever scientist was considered to be Thalus or Thales

3. Famous book Al-Qanoon and Al-Shifa was written by Bu Ali Sina

4. Muslim mathematician Muhammad Musa Khwarizmi introduced the

trigonometric ratios

5. The Muslim scientists who introduced Algebraic Arabic Numerals was Al-

Khawarizmi

6. The Muslim scientists who introduced Logarithm was Al-Khawarizmi

7. Binomial theorem was discovered by Umer Khayam

8. Famous book Al-Jabro Wal Muqabla was written by Al-Khawarizmi

9.

A hypothesis is tested by experiments

10. Longitude and latitude of earth was determined by Al-Beruni

11. The mixture of highly ionized ions is called Plasma

12. Physics is the Branch of science which studies the properties of matter and

energy and interaction between them

13. The first step in scientific method is to make observations of a natural

phenomena

14. The book Kitabul Manazir is written by Ibn-ul-Haitham 2013

15. Define physics and write name of four branches 2013

16. Write three contributions of Al-Beruni in field of science/Physics 2012

17. Kitabul-Manazir was written by Ibn-ul-Haitham 2011

18. Define physics and write name of four branches 2011






Kanwer M. Nabeel


19. The law of reflection was first given by Ibn-ul-Haitham 2010

20. Define any three branches of physics 2010

21. The name of famous book of Al-Beruni is Qanoon Al-Masudi 2009

22. Write down two contributions of Al-Beruni and Ibn-ul-Haitham 2009

23. Write down two contributions of Al-Beruni and Yaqoob Al-Kindi 2008

24.

Define the following : Plasma Physics

(this question contains other definitions also from other chapters)

2007

25. Write down two contributions of Al-Beruni and Ibn-ul-Haitham 2007

26.

The pin hole camera was invented by Ibn-ul-Haitham 2006

27. Write three contributions of Muhammad Bin Musa Khawarizmi 2006


29. Define physics and name any two of its branches 2005

30.

Write three contributions of AL-BERUNI 2004

31. Write down three contributions of Yaqoob-Al-Kindi in the field of

science/Physics2003

32.

Define Physics and name its six branches 2002

33. The book Al-Manazir/Kitabul-Manazir was written by Ibn-ul-Haitham 2001

34. Write down three contributions of Ibn-ul-Haitham in the field of science

/physics2001


36.

Define Physics and name its any four branches 2000

37. The behavior of atoms in the isolated state is studied under the branch of

physics is called atomic physics1999

38. Write down three contributions of Ibn-ul-Haitham in the field of science

/physics1999

39. Dr. Abdus Salam was awarded Noble Prize for his work on Grand Unification

Theory (G.U.T) 1998






Kanwer M. Nabeel


40. Kitab “Qanoon-Al-Masoodi” was written by Al-Beruni 1997

41. The writer of the famous book “Al-Manazir” is Ibn-ul-Haitham 1994

42. The Muslim writer of the famous book “Kitabul Manazir” is Ibn-ul-Haitham 1993

Note : Al-Khwarizmi and Bu-Ali-Sina Contributions are not included in current book

-------------------------------------------------------------------------------------------------------------------------






Kanwer M. Nabeel


Chapter – 2 : MEASUREMENTS

S.No. Question Year/Book

1.

With what instrument you can find:

i) Mass of a body, ii) length of a rod, iii) time of an experiment / time of an

event.

2.

Give definition of following standards :

i) Standard of Length – Meter

ii) Standard of Mass – Kilogram

iii) Standard of Time – Second

iv)

Standard of Electric Current –

Ampere

v)

Standard of Luminous Intensity – Candela

vi)

Standard of Thermodynamic Temperature – Kelvin

vii) Standard of Amount of substance – Mole

viii) Standard of Force – Pound Force

3. A mean to establish a relationship between two physical quantities is called a

graph

4. SI unit system is closely related to MKS system of units

5. In British Engineering system unit of mass is Pound

6. Mass per unit volume is called Density

7.

Systematic error occur due to error in measuring Instrument

8. Error occur due to improper use of instrument is called Personal error

9.

A measuring cylinder is used to measure Volume

10. 10-6

is called Micro

11. Light year is the unit of distance

12. The SI unit of Volume is metre-cube or m3

13. The SI unit of Area is metre-square or m

2

14. The least count of a vernier calipers is 1/100th

or 1/200th

of a cm (centimeter)






Kanwer M. Nabeel


15. The least count of a vernier calipers is 0.01 or 0.005 of a cm (centimeter)

16. The least count of a vernier calipers is 1/10th

or 1/20th

of a mm (millimeter)

17. The least count of a vernier calipers is 0.1 or 0.05 of a mm (millimeter)

18. The least count of a Micrometer screw gauge is 1/1000th

of a cm (centimeter)

19.

The least count of a Micrometer screw gauge is 0.001 of a cm (centimeter)

20. The least count of a Micrometer screw gauge is 1/100

th of a mm (millimeter)

21. The least count of a Micrometer screw gauge is 0.01 of a mm (millimeter)

22.

1 inch = 2.54 cm

23. 1 meter = 39.37 inches

24.

1 hour = 60 minutes = 3600 seconds

25. One kilo metre have 103 or 1000 metres

26. The radius of a wire is 0.022 cm. The number of significant figures in this

measurement is 2 or two

27. Length, mass and time are fundamental quantities

28. 1 Pico second = 10-12

second 2013

29.

Write the SI unit of following Physical quantities :

i)

Length. Meter or m

ii) Electric Current. Ampere or A or Amp

iii) Pressure. Newton per metre square or N/m2 or Nm

-2

iv)

Work. Joule or J

v)

Volume. Metre cube or m3

vi)

Force. Newton or N

vii) intensity of sound Watt/metre square or W/m2

2013

30. One nano metre is equal to 10-9

or 1/1000000000 or 0.00000001 metre 2012

31. Unit of light intensity is candela 2011

32.

One micro-metre is equivalent to 10-6

metre or 1/1000000 metre or 0.000001

metre 2011






Kanwer M. Nabeel


33. The S.I unit of mass is Kilogram or kg 2010

34. One Milli ampere = 10-3

or 1/1000 or 0.001 ampere 2008

35. The fundamental unit of length in S.I unit system is metre 2008

36.

Write the S.I unit of following :

i)

Volume. Metre cube or m3 ,

ii) Pressure Newton per metre square or N/m2 or Nm

-2 ,

iii) Stress Newton per metre square or N/m2 or Nm

-2 ,

iv) Work Joule or J ,

v) Momentum Kilogram – metre per second or kg-m/s or kg-ms-1

,

vi)

Latent heat Joule per kilogram or J/kg or J-kg-1

2007

37. Zero error is a kind of Systematic error 2007

38.

Define the following : Random error


2006

39.

Write the following as the power of 10 (or in exponential form) :

i) Deca , ii) Mega, iii) Giga, iv) Deci, v) Pico, vi) Micro

2006

40. Write three fundamental and three derived units with their symbols 2005

41. Physical balances is used for measurement of mass 2004

42. One micro-farad = 10-6

or 1/1000000 or 0.000001 farad 2004

43.

Identify the following as fundamental and derived units and name their physical

quantities

i) Metre (m), Fundamental , Length

ii) Kilogram (kg), Fundamental , Mass

iii)

Newton (N), Derived , Force iv) Ampere ( A), Fundamental , Current / electric current

v) Pascal (N/m2), Derived , Pressure

vi) Kelvin (K ), Fundamental , Temperature

vii) Metre per second square (m/s2), Derived , Acceleration

viii) Coulomb (C ), Derived , Electric charge / charge

2004

44.

Define the following : Random error


2003






Kanwer M. Nabeel


i) Absolute Temperature. Kelvin or K

ii) Amount of substance. Mole or mol

iii) Force. Newton or N

iv) Torque. Newton metre or N-m

v) Energy. Joule or J

vi) Pressure. Newton per metre square or N/m2 or N-m

-2

57. Write any three fundamental units and any three derived units 1998

58. One micro-second = 10-6

or 1/1000000 or 0.000001 second 1997

59.

The spindle of screw gauge moves through 0.05 cm for each complete

revolution1996

60.

Write down the units of following:

i) Charge : Coulomb (C)

ii) Potential difference : Volt (V)

iii) Work : Joule (J)

iv)

Capacitance : Farad (F)

v) Power of a lens : Dioptre

vi) Force : Newton (N)

vii)

Electric power : Watt (W)

viii) Commercial unit of electrical energy : Kilo-Watt-Hour (kWh)

1996

61.

One micro-coulomb = 10

-6

or 1/1000000 or 0.000001 coulomb 1995

62.

Write the SI unit of following:

i) Density. Kilogram per metre cube or kg/m3 or kg-m

-3

ii)

Power. Watt or W

iii) Velocity. Metre per second or m/s or ms-1

iv) Momentum. Kilogram – metre per second or kg-m/s or kg-ms-1

v) Heat / Heat energy. Joule or J

vi) Area. Metre square or m2 ,

vii) Pressure. Newton per metre square or N/m2 or N-m-2 ,

viii) Acceleration. Metre per second square or m/s2 or ms

-2

1995

63. One micro-second = 10-6

or 1/1000000 or 0.000001 second 1994

64. One micro-ampere = 10-6

or 1/1000000 or 0.000001 ampere 1993

-------------------------------------------------------------------------------------------------------------------------






Kanwer M. Nabeel







Kanwer M. Nabeel


Chapter – 3 : KINEMATICS OF LINEAR MOTION

Question Year/Book

1. Shortest distance between two points is called displacement

2. A body is thrown vertically upward, the magnitude of its acceleration will be

9.8 ms-2

3. A truck covers a distance of 360 km in 5 hours, its speed is 72 km/h or 20 m/s

4.

The velocity of a motorcycle changes from 10ms-1

to 20ms-1

in 10s. if the

motorcycle does not change its direction then calculate its average acceleration

(Answer : 1 m/s2 )

5.

The velocity of a car becomes 10m/sec to 60 m/sec in 20sec. calculate its

average acceleration

(Answer : 2.5 m/sec2 )

6.

If a ball is thrown vertically upward with a velocity of 20 ms-1

. Then determine

i) Maximum height which the ball attain

ii) Time to reach the maximum height

(Answer : i) 20 m ii) 2 sec )

7.

A dolphin jumps from the surface of water and returns to the surface of water

after reaching the height of 1.8 m. Determine the velocity of dolphin to its way

back to the surface of water / Determine the velocity of dolphin to its way down

surface of water / Determine the initial speed of dolphin

(Answer : 5.93 ms-1

or 6 ms-1 )

8.

A shell is fired vertically upward with a velocity of 98 m/s. Find ,

i)

Time taken it to reach the highest point.

ii) How long it will stay in air ( or total time of flight)

iii)

The maximum height reached

iv) The velocity with which it will hit the ground

(Answer : i) 10 s , ii) 20 s, iii) 490 m , iv) 98 m/s)

9. The thunder of a cloud is heard in 1 sec after seeing the flash. Find the distance

of thunder cloud if velocity of sound is 341 m/s






Kanwer M. Nabeel


(Answer : 341 m)

10.

A ball is dropped from a tower. It reaches the ground in 10 seconds. Calculate

the height of tower and the velocity with which it hits the ground.

(Answer : 500 m and -100 ms-1 negative sign indicates that V f is in

downward direction)

11.

A motorcyclist covers 150m in 10seconds. Find the speed / velocity of motor

cycle

(Answer : 15 ms-1 )

12.

A train starting from station acquires a speed of 90 km/h in 25 minutes. It then

continues to move with uniform speed for two hours. Then brakes are applied

and it comes to rest in 25 minutes. Find the total distance covered

(Answer : 217500 m or 217.5 m )

13. The rate of change of velocity is called acceleration 2013

14.

The velocity of a car increases by an acceleration of 2 m/s2 and becomes 20 m/s

in 5 seconds. Find the initial velocity of car.

(Answer : 10 m/s)

2013

15.

Derive the equation S= Vi t + ½ at2

2013

16.

A car is moving on a straight road at a speed of 5m/s. it is accelerated at 3m/s2.

Calculate its velocity after 4 seconds.

(Answer : 17 m/s)

2012

17. Derive the equation 2aS = Vf 2-Vi

2 2012

18.

If V = 10m/s and t = 5sec , then S will be 50 m 2011

19.

Rate of motion in specific direction is called Velocity 2011

20. Acceleration of 1kg ball for downward / upward motion is 9.8m/s2 2011

21.

A stone is dropped from a tower. It reaches the ground in 5 seconds. Calculate

height of tower.

(Answer : 122.5 m)

2011

22. Derive the equation S= Vi t + ½ at2 2011






Kanwer M. Nabeel


23. The acceleration of a ball thrown vertically upward will, in SI system will be -

9.8m/s2

2010

24.

A car starts from rest and attains a speed of 36 km/hr in 2 minutes. Find

acceleration of car.

(Answer : 0.08 m/s2 )

2010


2 2010


27.

A motorcycle is moving with velocity 72km/hr on a straight road. When breaks

are applied the motorcycle comes to rest after covering a distance of 10 meter.

Calculate its acceleration / deceleration.

(Answer : -20 m/s2 )

2009

28. The speed of a body in given direction is called Velocity 2009


2 2008

30.

A car is moving with velocity of 36km/hr is brought to rest in 5 seconds, find its

acceleration / deceleration.

(Answer : -2 m/s

2

)

2008

31.

Write to points of differences between : Distance and displacement

(this question contains other terms also from other chapters)

2008


33.

Define the following : Retardation


2007

34. The distance covered per second by a moving body in a particular direction is

called Velocity 2007


2 2006

36.

Define the following : speed


2006

37. A ball is dropped from a height of 176.4 m. how much time it will take to reach

2006






Kanwer M. Nabeel


the ground.

(Answer : 6 sec)

38. The speed in a given direction is called Velocity 2006


40.

A shell is fired vertically upward with a velocity of 98 m/s , find the maximum

height reached by shell.

(Answer : 490 m)

2005

41.

Define the following : acceleration


2005

42. The speed in a given direction is called Velocity 2005

43. Derive the equation Vf 2

= 2aS + Vi2 2004

44.

Write down two point of differences between following with respect to their

definition and formula :

Speed and Velocity


2004

45.

Define the following :

i) Kinematics

ii)

displacement


2004


47.



(Answer : 17 m/s)

2003


2 2002

49.

Define the following : Variable velocity


2002

50. A body is projected upward with a velocity of 30 m/s. how high would it rise. 2002






Kanwer M. Nabeel


(Answer : 45.9 m)


52.

Write down two point of differences between following : Speed and Velocity

(this question contains other terms also from other chapters)2001

53.

A shell is fired vertically upward with a velocity of 98 m/sec. Find the time taken

to reach highest point.

(Answer : 10 sec)

2001


2 2000

55.

Define the following : Displacement


56.



(Answer : 17 m/s)

2000


58.


the height of the tower and velocity with which it hit the ground.

(Answer: 122.5 m and 49 m/s)

1999


60.


the velocity with which it hit the ground.

(Answer: 49 m/s)

1998

61.



1998

62.

Define the following : acceleration


1997


2 1997







Kanwer M. Nabeel



2 1995

66.

A train is moving with velocity 72km/hr on a straight road. When breaks are

applied a retardation of 0.5m/s2 is produced. Find the time it will take to stop.

( Answer : 40 sec)

1995

67.



1994

68.

Derive the equation S= Vi t + ½ at2 1993

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Kanwer M. Nabeel


Chapter – 4 : FORCE AND MOTION

S.No Question Year/Book

1.

Explain the force of action and reaction in the following :

i) Bullet is fired from a gun

ii) A person sitting on a chair

iii)

Motion of moon around the earth

2.

An agent which produces motion of a body is called Force

3. In M.K.S system unit of force is Newton (N)

4. In C.G.S system unit of force is dyne

5. Unit of force , Dyne = g.cm /s2

6. 1 dyne = 10-5

Newton

7. Force can move objects as well as can deform or distort or change the shape of

the objects

8. Newton gave “laws of motion” in his book Principia

9.

The SI unit of momentum is kg.m/s or N.s

10. Action and reaction forces are same in magnitude but opposite in direction

11. Greater the mass of a body greater would be its inertia

12. Law of conservation of momentum is applicable in isolated system

13.

A block of mass 200 g and 300 g are tied to the ends of a string and the string

passes over a friction less pulley. 300 g mass body moves along the horizontal

surface of the table. While the 200 g mass moves vertically downward. If the

friction of surface and friction of pulley is zero / there is no friction. Find the

acceleration of the system and tension in the string

(Answer : 4 m/s2 and 1.2 N )

14.

A truck of mass 2000 kg is moving with a velocity is 45kmh-1

collides with a

stationary car and both moves together in forward direction. If the mass of car

is 500 kg, find out the velocity with which both will move after collision.

(Answer : 10 ms-1

)






Kanwer M. Nabeel


28. Write three differences between mass and weight 2011

29. Write down three methods of reducing friction. 2010

30. Define Linear momentum / momentum. Write down its formula and S.I unit. 2010

31. Write two points of difference between mass and weight 2009

32.

Define the following laws :

i) Law of conservation of momentum

ii) Law of inertia / 1st

law of motion


2009

33.

Define the following laws : Law of conservation of momentum


34.

Define the following terms :

i) Newton (unit)

ii)

Force


2008

35. Write down three methods of reducing friction. 2008

36.

Define friction. Write down its two advantages and two disadvantages. 2007


38.


Law of conservation of momentum


2007

39. Why is it difficult to drive a motorcycle / vehicle on an oily road (Reason) 2007

40.

A bullet of mass 0.1 kg is fired with velocity of 60 m/s. calculate the momentum

of the bullet.

(Answer : 6 kg-m/s or 6 N-s )

2006

41. State Newton’s laws of motion and give one example of each of the 1

st and 3

rd

law.2006

42. What is mass of an object whose weight on earth is 294 N 2006






Kanwer M. Nabeel


(Answer : 30 kg )


44.

Define the following : coefficient of friction


45.


i)


ii)

2nd

law of motion


2005

46.

A Body weighting 25N is placed on a wooden plank. How much force is required

to set it in motion if the co-efficient of friction between body and plank is 0.4

(Answer : 10 N )

2005

47.

An object of mass 20 kg is moving with acceleration of 3 m/s2. Find the force

acting on it.

(Answer : 60 N )

2004

48. Define Momentum and write down its SI unit. State and explain the law of

conservation of Momentum.2004

49.

Define the following : coefficient of friction


2003

50.



ii)

2nd

law of motion


2003

51.

Write down two advantages and two disadvantages of friction 2003

52. A body thrown upward always falls to ground. Why? (Reason) 2003

53.

Write down two points of difference between each of the following with

respect to their definition and SI unit :

Mass and Weight

2002

54. Define the following : 2002






Kanwer M. Nabeel


Momentum


55.


i) Law of inertia / 1st

law of motion

ii) 3rd

law of motion


2002

56.

A force of 10 N is required to move one part of machine over another. If the

weight of the upper part is 50 N. find the co-efficient of friction between two

parts.

(Answer : 0.2 )

2002

57. A body thrown upward always falls to ground. Why? (Reason) 2002

58.

Define the following : Limiting friction


2001

59.



ii) Newton’s 1st

law of motion


2001

60. With the help of Newton’s 2nd

law derive the formula F = ma 2001


62. The passengers fall in forward direction when a moving bus suddenly stops.

Why ? (Reason)2000

63.


Newton’s 3rd law of motion


2000

64. Define force of friction and write down four methods of reducing the friction. 2000

65. Explain why it is dangerous to jump from a fast moving vehicle. (Reason) 1999

66. If mass of a body is 3 kg , its weight will be 29.4 N 1999






Kanwer M. Nabeel


67. State “Law of conservation of Momentum” and explain it with the help of an

example.1999

68.


Newton’s 1st

law of motion


1999


70. If weight of a body is 98 N its mass will be 10 kg 1998

71. Rolling friction is less than sliding friction. Why? (Reason) 1998

72.



ii)

Newton’s 2nd

law of motion


1998

73. Mass of an object (m) = its weight (W) / acceleration due to gravity (g) 1997

74.

Define the following : Momentum


1997

75.


Newton’s 3rd

law of motion


1997

76.




1996

77. In MKS / SI system the unit of force is Newton (N) 1995

78.

If the mass of a body is 5 kg its weight will be 49 N 1995

79. Differentiate between mass and weight 1995

80. What is meant by friction? What are its two main kinds? Write any two

methods of reducing friction.1995

81. If the weight of a body is 49.0 N then its mass is 5 kg 1994






Kanwer M. Nabeel


Chapter – 5 : VECTORS


1.

Sort out the following or identify the following physical quantities as scalar and

vectors :

i) Density. Scalar

ii)

Power.

iii) Energy. Scalar

iv) Work. Scalar

v)

Weight. Vector

vi)

Temperature. Scalar

vii) Electric potential or potential difference. Scalar

viii)

Electric charge or charge. Scalar

ix)

Heat. Scalar

x) Acceleration. Vector

xi) Area. Scalar

xii)

Velocity or velocity of a car. Vector

xiii) Torque. Vector

xiv) Sound or sound energy. Vector

xv)

Pressure. Scalar

xvi) Pages of a book. Scalar

xvii)

Electric current. Scalar xviii)

Light or light energy. Vector

xix) Length. Scalar

xx) Displacement. Vector

xxi)

Speed. Scalar

xxii)

Mass. Scalar

xxiii) Force. Vector

xxiv)

Time. Scalar

xxv) Volume. Scalar

xxvi) Momentum. Vector

2.

A submarine dives 50 m at an angle of 300 with the horizontal surface of the

sea. How deep / far is the submarine from the surface of sea.

(Answer : 25 m )

3. In a right angle triangle tan θ = perpendicular / base

4. Physical quantities are basically divide into 2 categories that is scalars and

vectors

5.

Vectors does require direction along with magnitude and unit






Kanwer M. Nabeel


6. The quantities which do not require direction are scalar quantities

7. Fx = F cosθ represents X or Horizontal component of vector F

8. Fx = F sinθ represents Y or Vertical component of vector F

9. Thu sum of two vectors cannot be greeter than resultant vector

10. If AB is a vector then its negative vector would be written as -AB

11. To add two or more vectors we use Head-to-tail / Graphical method

12. When a vector is multiplied by a positive number only its magnitude is changed

13. When a vector is multiplied by a negative number its magnitude and direction is

also changed

14. In a right angle triangle sin θ = perpendicular / hypotenuse

15. In a right angle triangle cos θ = Base / hypotenuse

16. Muslim mathematician Muhammad Musa Khwarizmi introduced the

trigonometric ratios

17. Negative of a vector is that vector which is equal in magnitude but opposite in

direction 2013

18.

Find the two rectangular components of a force of 100 N which is acting at an

angle of 600 with X-axis. Sin 60

0 = 0.866 , Cos 60

0 = 0.5

(Answer : 50 N , 8606 N )

2013

19. When two forces Fx = 6N and Fy = 6N the angle between them is 45

0 2012

20. Define scalar and vector quantities with two examples of each. 2012

21.

Define resolution of vector. With the help of trigonometric ratios find the

magnitude of horizontal and vertical components of a vector.

Or

Define resolution of vector. How a vector is resolved into its components.

2012

22.

A force of 100N acts at an angle of 600 with the horizontal. Find its horizontal

and vertical components. Cos 600 = 0.5 and Sin 60

0 = 0.866.

(Answer : F x = 50 N and F y = 86.6 N)

2012






Kanwer M. Nabeel


23. Define resolution of vector. Write down two formulae for rectangular

components.2011

24. A force of 25 N acts along X-axis, its Y-component will be 0 N 2010

25.

Two forces of 3N and 4N are acting on a body. If the angle between them is 900

then find the magnitude of resultant vector.

(Answer : 5 N )

2010

26. If Fx and Fy are the horizontal and vertical components of a vector F. write down

the formulae for magnitude and direction of F. Show Fx , Fy and F by diagram.2010

27.


Or



Or

What is meant by resolution of a vector? Find the magnitude of its rectangular

components.

2009

28. Write two points of difference between scalar and vector. 2008

29.

A roller tied to a string is dragged on the floor making an angle of 600 with the

floor. If the tension in the string is 20N, find the force by which roller is dragged.

Cos 600 = 0.5 and Sin 60

0 = 0.866

( Answer : 10 N )

2007

30.


Addition of vectors


2007

31.

Define resultant of vector and describe the addition of a vector by head-to-tail

rule.

Or

Define resultant of vector and describe the addition of a vector by graphical

method.

2006







Kanwer M. Nabeel




Or


45. Distinguish between scalar and vectors 1997

46.

Find the magnitudes of horizontal and vertical components while resolving a

vector.

Or

Derive the formulae for horizontal and vertical components of a vector.

1997

47.

Explain the graphical method of addition of vectors.1996

48.

A force of 60N acts at an angle of 600 with the horizontal. Find its horizontal and

vertical components. Cos 600 = 0.5 and Sin 60

0 = 0.866.

(Answer : F x = 30 N and F y = 51.96 N)

1995

49.

Differentiate between scalar and vectors 1994

50. Displacement is an example of vector quantity 1994

51.

Define the “resolution of a vector” and describe the method of resolving a

vector into its rectangular components.

Or

What is meant by resolution of a vector? Find the magnitude of its rectangular

components.

1993






Kanwer M. Nabeel


Chapter – 6 : EQUILIBRIUM


1.

A paratrooper falling shows an example of dynamic equilibrium

2. Axis of rotation is fixed point / line about which a body rotates

3. Force applied to the car’s steering by the both hands is an example of couple or

couple of forces

4. To move objects we apply force

5. To rotate objects we apply torque

6.

The turning effect of force is called torque

7. The unit of torque is Newton . metre or N.m

8. In equilibrium the sum of all forces and all torques on a body is zero

9. The centre of gravity of a uniform circular plate is at its centre or geometrical

centre.

10. The centre of gravity of a regular shape is at its geometrical centre

11. Earth is in dynamic equilibrium

12.

Two equal but opposite forces acting on same body at different points is called

couple

13. A couple (or couple of forces) can only rotate a body

14. The turning effect of force is called torque or moment of force

15. If two or more equal and parallel forces acts on a body having same direction

then they are like parallel forces

16.

If two or more equal and parallel forces acts on a body having opposite

direction then they are unlike parallel forces

17. The rotational effect of force is measured by a physical quantity called torque

18. To move an object you apply force but to rotate an object torque is applied

19. If the centre of gravity of a body is lower than its point of support, then its

equilibrium will be stable






Kanwer M. Nabeel


20. A body will be in stable equilibrium if its centre of gravity lies below the point

of suspension or point of support.

21. If the centre of gravity of a body is raised up than its point of support, then its

equilibrium will be unstable

22.

A body will be in unstable equilibrium if its centre of gravity lies above the point

of suspension or point of support.

23. If the centre of gravity of a body is neither raised nor lowered from point of

support, then its equilibrium will be neutral

24. A body will be in neutral equilibrium if its centre of gravity lies at the point of

suspension or point of support.

25. What is couple? Calculate the moment of couple.

26. Sum of all counter-clockwise moments (or counter-clockwise torques) = Sum of

all clockwise moments (or clockwise torques) , is called principle of moments.

27. If 1

st condition of equilibrium is satisfied then the body will be in translational

equilibrium.

28. If 1

st condition of equilibrium is satisfied then the body will have no linear

acceleration or zero linear acceleration.

29.

If 2nd

condition of equilibrium is satisfied then the body will be in rotational

equilibrium.

30.

If 2nd

condition of equilibrium is satisfied then the body will have no rotational

acceleration or no rotational acceleration.

31.

The point at which whole weight of a body acts is called centre of gravity

32. The point at which whole mass of a body acts is called centre of mass

33. For body to be in complete equilibrium both conditions or two conditions of

equilibrium must be satisfied.

34. The first condition of equilibrium is mathematically expressed as ΣF = 0

35. The second condition of equilibrium is mathematically expressed as Στ = 0

36. The torque produced is positive when rotation of body is anti-clockwise or

counter-clockwise

37. The torque produced is negative when rotation of body is clockwise






Kanwer M. Nabeel


38. The direction of torque is given by right hand rule

39. Torque produced will be maximum if angle between force (F) and moment arm

(d) is 900

40. Torque produced will be maximum if force (F) and moment arm (d) is are

perpendicular to each other

41. Torque produced will be minimum if angle between force (F) and moment arm

(d) is 00

42. Torque produced will be minimum if force (F) and moment arm (d) is are

parallel to each other

43. If the centre of gravity of a body is lower than its point of support, then its

equilibrium will be stable

2013

44. Define Torque. Write down its unit and formula. 2013

45.


Couple or Couple of forces


2013

46. Define equilibrium. Write three states of equilibrium and give one example of

each.2012

47. A body will be in state stable equilibrium if its centre of gravity lies below the

point of suspension.2010

48. Define equilibrium. Write down the conditions of equilibrium and their related

formulae.2010

49.

A force of 50N acts on a body. If the moment arm is 0.5m, find the value of

torque.

( Answer : 25 N-m )

2010

50.


i)

Torque or moment of force

ii) Centre of gravity


2009

51. Write three states of equilibrium and explain with the help of diagram. 2009






Kanwer M. Nabeel


52. The point at which whole Weight of a body appears to act is called centre of

gravity.2008

53. Why a person has to bend down while carrying a load on his back. (Reason) 2007

54.

A force of 100N rotates a body about its axis. If the arm of the force (or momentarm) is 2.5 cm. Find the magnitude of the torque.

( Answer : 25 N-m )

2007

55. Define equilibrium. Describe three states of equilibrium 2006

56.


iii) Torque or moment of force

iv)

Centre of gravity


2005

57. The second condition of equilibrium is mathematically expressed as Στ = 0 2005

58.

Why does an acrobat hold a rod while walking on a rope. (Reason) 2005

59. Define equilibrium. Describe two conditions of equilibrium 2004

60. Torque is a vector quantity 2003

61.

A force of 20N is applied at the edge of a wheel of radius 40cm. find the torqueacting on the wheel.

( Answer : 8 N-m )

2003

62.

A force of 20N is applied at the edge of a wheel of radius 40cm. find the torque

acting on the wheel.

( Answer : 8 N-m )

2002

63. How is a heavy boy balanced by a lighter boy on see-saw? (Reason) 2002

64. Define equilibrium. Describe three states of equilibrium with one example of

each.2001

65.

Define Torque. Write down the factors on which it depends and how it is

measured.

Or

Define Torque. Write down the factors on which it depends and write its

formula.

2000






Kanwer M. Nabeel


66.


Centre of gravity


1999

67.


Centre of gravity


1998

68. State two conditions of equilibrium 1998

69. Torque = Force x Force arm or moment arm 1997

70.


Centre of gravity


1997

71. The point at which whole weight of a body acts is called centre of gravity. 1996

72.

State the conditions of equilibrium

Or

State two conditions of equilibrium

1996

73. State two conditions of equilibrium 1995

74.


Torque


1995

75.


i)

Equilibrium

ii) Torque


1994

76.


i) Torque

ii)

Centre of gravity


1993






Kanwer M. Nabeel


Note : Numericals of 1st

and 2nd

conditions of equilibrium are included in current

book






Kanwer M. Nabeel


Chapter – 7 : CIRCULAR MOTION & GRAVITATION


1. F = - G m1m2 /r

2 , here –ve sign shows attraction

2. Gravitational force is always attractive

3. If mass of Earth is doubled the value of g will be doubled

4. If mass of Earth is doubled the value of G will be remain same

5. The value gravitational constant G can be affected by none.

6.

The value of gravitational constant G was first experimentally determined byHenry Cavendish

7. The value of gravitational constant G was first experimentally determined by an

instrument called Cavendish Balance

8. The orbital velocity of a satellite under the action of gravitational force is near

Earth is 7.9 kms-1

or 7920 m/s

9. Average density of planet Earth is 5500 kg/m3

10.

A satellite is revolving around the Earth at a height of 22000 km. what will be

the value of g on the satellite. Take g at earth = 10 ms-2

(Answer : 0.5 ms-2

)

11. Geo stationary satellite are used for transmissions of channels

12. Geo stationary satellite have zero velocity relative to earth

13. Typically Geo stationary satellite are at a height of 36000 km above the earth

surface

14.

The mass of earth can be determined by universal law of gravitation

15. The centripetal force is always directed towards centre of a circle.

16. The centrifugal force is always directed away from centre of a circle.

17. The centripetal acceleration is always directed towards centre of a circle.

18. The velocity of a body moving in a circular path is along the tangent






Kanwer M. Nabeel


34. State Newton’s law of gravitation and derive the relation F = G m1 m2 / r2 2009

35. The value of G is 6.67x10-11

Nm2 / kg

2 2009

36.

Define centripetal force. What are the factors on which it depends? Write down

the formulae of centripetal force.2009

37.

A mass of 10kg at the end of a string is being whirled in a circle of radius 5m

with a speed of 4m/s. what will be the centripetal force on it.

( Answer : 32 N)

2008

38. Write two points of difference between ‘g’ and ‘G’. 2008

39.

Define Newton’s law of gravitation and find the equation for the mass of Earth

with the help of formula F = G m1 m2 / r2

Or

Define Newton’s law of gravitation and find the equation for the mass of Earth

2008

40. The value of G is 6.67x10-11

Nm2 / kg

2 2007

41.


Law of gravitation

Or

Newton’s universal law of gravitation


2007

42. Define centripetal force, centripetal acceleration. Write their formula and units. 2007

43.

What is mass of an object whose weight on earth is 294 N

(Answer : 30 kg )

2006

44. State the Newton’s law of universal gravitation and Prove that Me = g R2 /G 2006


46.

Calculate the tension in a string 50m long when it is tied at its end to mass of

0.2kg and whirled in a circle with speed of 100m/s

(Answer : 40 N )

2005

47. Define the following terms : 2004






Kanwer M. Nabeel


Centripetal force


48. The magnitude of centripetal acceleration is ac = mv2/r 2004

49.

Derive the equation Me = g R2 /G to determine the mass of earth, by applying

the law of gravitation.

Or

By applying law of gravitation find the mass of earth.

Or

By applying law of gravitation find the relation Me = g R2 /G and determine the

mass of earth.

2004

50.

The weight of a body less at the Equator then at the poles. Why? (Reason)

Or

The weight of a body at the poles of the Earth is greater than that at the

Equator. Why? (Reason)

2004

51.


Centripetal force


2003

52.


Law of universal gravitation

Or

Newton’s universal law of gravitation


2003

53.

A motorcyclist is travelling along a circular path of radius 30m at a speed of

5ms-1

. If the total mass of rider and motorcycle is 360kg, find the magnitude of

centripetal force acting on him.

(Answer : 300 N )

2002







Kanwer M. Nabeel


in a circle with speed of 10m/s.

(Answer : 80 N )

67. The formula for centripetal force is equal to F = mv2/r 1996

68.

Using Newton’s gravitational law of force, determine the mass of earth

Or

Find the mass of Earth with the help of Newton’s law of gravitation.

1996

69.

Calculate the tension in string 50cm long, tied to a mass of 200gm and whirled

in a circle with speed of 10ms-1

.

(Answer : 40 N )

1996

70.

State Newton’s law of gravitation and derive the relation

F = G m1 m2 / r2

1995

71.


Centripetal force


1995

72. The equation Me = g R

e

2 /G is used to determine mass of Earth. 1994

73.


Centrifugal force


1994

74. Centripetal force is equal to F = mv2/r 1993

75. State the law of gravitation and describe an experiment to find the value of

gravitational constant G.1993






Kanwer M. Nabeel


Chapter – 8 : WORK, POWER & ENERGY


1.

Work done is closely related to energy

2. The unit of work and energy is same, which is joule (J)

3. Work is done when force acts on a body and body is displaced in the direction

of force

4. Another famous unit of energy other than Joule (J) is calorie (cal)

5. According to law of conservation of energy, total energy of a system remains

conserved / constant

6. One calorie (cal) = 4.2 Joules or 4.2 J

7. The energy stored in a body due to displacing it is called Potential Energy (P.E)

8. Total Energy of a body always remains conserved / constant

9.

The energy stored in a body due to displacing it under gravitational field is

called Gravitational Potential Energy

10.

The energy produced in a body due to its motion is called Kinetic energy (K.E)

11. Ability of a body to do work due to its position is called Potential Energy

12.

The unit kg-ms-2

is equal to Joule (J)

13.

An electric motor lifts a weight of 2N up to a height of 5m in 4s. Find the power

of the motor in watt and horse power.

(Answer : 2.5 W and 0.00335 hp )

14.

Work done will be maximum if angle between force (F) and displacement (d) is0

0

15. Work done will be maximum if force (F) and displacement (d) are mutually

parallel to each other

16.

Work done will be minimum / zero if angle between force (F) and displacement

(d) is 900

17. Work done will be minimum / zero if force (F) and displacement (d) are

mutually perpendicular to each other






Kanwer M. Nabeel


18. Work done is positive if force (F) and displacement (d) has same direction

19. Work done is negative if force (F) and displacement (d) has opposite direction

20. Work done or work is a scalar quantity

21. Energy is a scalar quantity

22. Power is a scalar quantity

23. The S.I unit of power is watt (W)

24. Watt (W) = Joule / Sec or J/s

25. 1 kW = 103 Watt or 10

3 W

26.

A famous unit of power other than S.I unit is horse power (hp)

27. 1 horse power (hp) = 746 watt

28. Dose a hydrogen filled balloon posses any potential energy.

29. The unit kg.m2.s

-2 is equal to Joule (J)

30.

Another formula fro calculating power (P) is F.v

Or

Power (P) is the product of Force and Velocity

31. There are 2 types of Potential energy, which are Gravitational Potential energy

and Elastic potential energy

32.

A force of 100N acting on an object and displaces the body. Find the work done

if the body covers a distance of 50 m.

(Answer : 5000 J or 5x103 J or 5 kJ)

33. The energy stored in an elastic material such as spring when it is stretched or

compressed is called elastic potential energy

34. A body possess Kinetic Energy (K.E) due to its motion or velocity

35. Energy possessed by a body due to velocity or motion or movement is called

kinetic energy (K.E)

36. A body possess Potential Energy (P.E) due to its Position






Kanwer M. Nabeel


37. Energy possessed by a body due to its position or is called potential energy

(P.E)

38. The SI unit of energy is Joule or J 2013

39.

Define Work and Energy. State the law of conservation of energy 2013

40. Write two differences between Kinetic energy and Potential energy 2013

41.

A force of 588N acts on a box to move it to a distance of 4m in 40seconds.

Calculate the power.

(Answer : 58.8 W)

2012

42. Define potential energy and kinetic energy and derive the relation K.E = ½ mV2 2012

43.

Define work and write down its two formulae. 2011

44.


Power


2011

45. The SI unit of work is N-m or Joule (J) 2010

46. Define potential energy and kinetic energy and write two points of differences

between them2010

47. Define kinetic energy and derive the relation K.E = ½ mV2 2009

48.

Find the work done when a force of 400N acts at an angle of 600 with the

ground moves an object to a distance of 10 meter along the ground. Cos 600 =

0.5

(Answer : 2000 J or 2x103 J or 2 kJ )

2009

49.

A 100kg car is accelerated at 4m/s2

from rest for 10 seconds. Calculate the work

done.

(Answer : 80000 J or 8x104 J )

2008

50.


Law of conservation of energy


2008






Kanwer M. Nabeel


51. Write two points of differences between potential energy and kinetic energy 2008

52.

What is kinetic energy of 200kg car which is travelling with velocity of 36 km/hr.

(Answer : 10000 J or 1x104 J or 10x10

3 J or 10 kJ )

2008


54. In SI system of unit the unit of work N-m or Joule (J) 2006

55. Define the Energy, Kinetic energy and derive the relation K.E = ½ mV2 2006

56. Define work and write down its two formulae and SI units. 2005

57.

Write down two point of differences between following with respect to their

definition and formula :

Kinetic energy and potential energy


2004

58.

Calculate the kinetic energy of an object moving withy velocity of 10m/s and

mass of 4kg.

(Answer : 200 J )

2004


60.

If the speed of a body is doubled its kinetic energy becomes four times.

Or

If the velocity of a body is doubled its kinetic energy becomes four times.

2003

61. State the law of conservation of energy and prove it with the help of an

example2003

62.


Power


2002

63. Derive the relation K.E = ½ mV2 2002


65. Find the work done when a force of 400N acts at an angle of 600 with the

ground moves an object to a distance of 10 meter along the ground. Cos 600 =

2001






Kanwer M. Nabeel


-----------------------------------------------------------------------------

0.5

(Answer : 2000 J or 2x103 J or 2 kJ )

66.

A force of 588N acts on a box to move it to a distance of 4m in 40seconds.

Calculate the power.

(Answer : 58.8 W)

2000

67.

Define work. Find out a relation to calculate the work done when a force is

applied in a direction making an angle θ with horizontal.

Or

Define work. Derive its formula

1999

68.

Define potential energy and kinetic energy and derive the relation K.E = ½ mV

2

1998

69.

A force of 100N acting on an object at an angle of 600 with horizontal. Find the

work done if the body covers a distance of 2m.

(Answer : 100 J)

1997

70. Work is the product of force (F) and displacement (d) 1995

71.

If the velocity of a body is doubled its kinetic energy becomes four times.

Or

If the Speed of a body is doubled its kinetic energy becomes four times.

1995

72.

Differentiate between

Kinetic energy and potential energy

1995

73. One calorie = 4.2 Joules 1994








Kanwer M. Nabeel


Chapter – 9 : SIMPLE MACHINES


1.

The first ever simple machine made by men is Wheel

2. In what ways are levers, an inclined plane and a pulley are alike.

3. Slope and slides are examples of inclined plane

4.

Name the six simple machine

5.

A person works 800 J in lifting, through a distance of 10 m vertically upward, a

bucket full of water weighting 70 N from the well. Calculate the percentage

efficiency of the men

(Answer : 87.5 %)

P.T.B

6.

The mechanical advantage of a lever is 2/3. How much effort on the load is

required to balance a body having mass of 15 kg.

(Answer : 225 %)

P.T.B

7.

A body is being lifted with the help of a crow-bar (or a lever) . Find the

mechanical advantage of the crow bar. When distance between fulcrum and

point of effort applied is 75 cm and distance between load lifted and fulcrumis 15 cm.

(Answer : 5 )

8.

A 4 m long plank is used for lifting a sack of flour having mass 100 kg on a truck.

If the body of truck is 1.5 m above the surface of road , then

i)

How much effort is applied for loading the sack on the truck /

calculate the effort to lift the sack

ii) Calculate the mechanical advantage of inclined plane

iii)

What is the angle formed by plank with road / what is the angle of

inclined plane with road. Take sin-1

(0.375) = 220

(Answer : i) 375 N ii) 2.67 iii) 220 )

9.

The length of the Tommy bar of a screw jack is 50 cm and pitch of bolt is 2.5

mm. how much load can be lifted by applying effort of 50 N on the Tommy bar.

Also calculate the mechanical advantage of screw jack

(Answer : 62800 N and 1256 )






Kanwer M. Nabeel


10.

A fish of mass 3 kg is hanging from one end of a fishing rod of length 2 m. how

much effort is applied to other end of the rod when fulcrum is 0.5 m away from

this end. Also calculate the mechanical advantage

(Answer : 88.2 N and 0.33 )

11.

A lever overcomes a resistance of 3300N when an effort of 165N is applied on

it. Calculate the mechanical advantage and efficiency of the lever, if the effect

arm is 25 times as long as load arm

(Answer : 20 and 80 %)

12.

Sort the following as different kinds of lever

Common balance : First kind of lever

See-Saw : First kind of lever

Handle of pump : First kind of lever

A pair of scissors : First kind of lever

Hand cart : Second kind of lever

Door : Second kind of lever

Cork squeezer : Second kind of lever

Punching machine : Second kind of lever

A hand cart-car : Second kind of lever

Wheelbarrow : Second kind of lever

Nut cracker : Second kind of lever

Oar of boat : Second kind of lever

Human arm : Third kind of lever

Forceps : Third kind of lever

Upper and lower jaws of mouth : Third kind of lever

13. A wedge is made by combining two inclined planes

14. For an ideal machine the ratio of output to input is always equal to 1

15. For an ideal machine the efficiency is always equal to 100 %






Kanwer M. Nabeel


33.

Define a machine and name six simple machines. Prove that the mechanical

advantage of an inclined plane is h / l = sin θ 2004

34.

Define the following

Pulley


2003

35. Define a lever. Write down its kinds and give one example of each. 2003

36.

An object of mass 100kg is raised 2m above the ground using an inclined plane

of length 10m. Calculate the effort applied parallel to the inclined plane.

(Answer : 196 N )

2003

37.

See-Saw is an example of First kind of lever 2002

38.


i) Pulley

ii)

Inclined plane


2002

39. Mechanical advantage of a screw jack is 2 ∏ r /h or 2 ∏ d /h 2002

40.

Define wheel and axle. And derive the formula for its mechanical advantage.

Or

Define wheel and axle. And determine its mechanical advantage.

2001

41. Define an inclined plane. Derive the formula for its mechanical advantage. 2000

42. Define lever and determine its mechanical advantage. 1999

43.


Pulley


1999

44. Define mechanical advantage. Determine the mechanical advantage of wheel

and axle1998

45.

Define an inclined plane. Find its mechanical advantage.

Or

1997






Kanwer M. Nabeel


Chapter – 10 : PROPERTIES OF MATTER


1.

Define surface tension. Explain it on the basis of Kinetic Molecular Theory (KMT)

2. Explain the three states of matter on the basis of kinetic Molecular Theory

(KMT)

3.

Define viscosity and coefficient of viscosity. How does it depend upon

temperature?

4. What is atmospheric pressure how you will measure it.

5. At high altitudes like mountains the atmospheric pressure is less

6. The property of fluid (gas or liquid) to offer resistance is called viscosity

7. Viscosity increases with decrease in temperature.

8. Basically there are three states of matter naming : Solid , liquid and gas

9. The SI unit of stress is Pascal (Pa)

10. Strain has no unit

11. Within elastic limit , the strain produced is directly proportional to applied

stress

12. The ratio of stress to strain is called Young’s Modulus (Y)

13. Pascal (Pa) = N.m-2

14. The SI unit of stress and pressure is Pascal

15.

A force of 4900 N is applied on a 3 m long wire that elongates it by 0.5 mm. the

area of cross-section of the wire is 0.2x10-4 m2. Find the value of Young’s

Modulus

(Answer : 1.47x1012

N.m-2

or 1.47x1012

Pa)

16. The formula for liquid and gas pressure is P = ρgh

17. Pascal law is about pressure of a liquid

18. Find the water pressure on a deep sea diver at a depth of 15 m, where the

density of sea water is 1030 kgm-3. Take value of g = 9.8 ms-2

Previous

Book






Kanwer M. Nabeel


(Answer : 151410 Nm-2

or 1.51x105 Nm

-2 or 151.41 kPa)

19.

An iron bar has cross section area 1000 mm2 is 4 m long. A force of 5000 N

increases its length by 0.25 mm. Find Young’s Modulus for this material.

(Answer : 8.0x1010

Nm-2 )

20.

A steel wire 4 m long and has an area of cross-section equal to 2.4x10-7

m2. It is

stretched by a force of 36 N. given Y = 1.8x1011

N/m2 calculate

i)

Stress

ii) Strain

iii)

Increase in length / change in length

(Answer : i) 1.5x108 Nm

-2

ii) 8.33x10

-4

iii) 3.3 mm or 33.32x10

-4

m )

21. The kinetic energy of a molecule is increased with increase in temperature

22. Archimedes’s Principle is applied to determine Specific Gravity 2013

23.

State the following laws / principles

i)

Hooke’s law

ii) Pascal’s law

iii) Archimedes principle

2013

24. Write two differences between Stress and Strain 2013

25.


i)

Surface tension

ii) Viscosity


2013

26. State Pascal’s law. And write its three uses in daily life. 2012

27.


i) Hooke’s law

ii)

Pascal’s principle


2011

28. The pressure of a liquid depends upon its density and height above the point

inside the liquid 2010






Kanwer M. Nabeel


29. State Pascal’s law. And describe any one of its application 2010

30.


Archimedes principle


2009

31. Define stress, strain and state Hooke’s law. Write the formulae for Young’s

Modulus of Elasticity2009

32. Why does a nail sink but a ship having huge mass floats on water? (Reason) 2009

33. State Pascal’s law. And explain working of hydraulic brakes system with the help

of diagram2008

34.


Hooke’s law


2008

35. Define the following terms :

Elasticity


2008

36.


Pascal’s law


2007

37. State Hooke’s law and find the formulae for Young’s modulus with the help of

this law2007

38. State Pascal’s law. And explain construction and working of hydraulic press

system with the help of diagram2006

39.


i)

Hooke’s law

ii)



2005


41. State Pascal’s law. And write its three applications. 2004






Kanwer M. Nabeel



43.


Hooke’s law


2003

44.

Write down two points of difference between each of the following with

respect to their definition and SI unit :

Stress and strain

2002

45.


i) Hooke’s law

ii)



2002

46.


Elasticity


2001

47. State Pascal’s principle. And write its three uses in daily life. 2001

48.




2000

49. Draw a figure of hydraulic press and write down its working and with its one

use.2000

50. The ratio of stress and longitudinal strain is called = Young’s Modulus 2000

51.

State the principle on which hydraulic lift works. Write down the constructionof a hydraulic lift

1999

52.


Hooke’s law


1999

53. Write two differences between Stress and Strain 1998






Kanwer M. Nabeel


Note : “Brownian motion and barometers” are not included in current book

-------------------------------------------------------------------------------------------------------------------------------------

54. State Pascal’s law. And write its uses in daily life. 1998

55.


Young’s modulus


1998

56. Hydraulic press is the practical application of the Pascal’s law 1997

57. Distinguish between stress and strain 1997

58.


Pascal’s law


1997

59. ---------------------- None -------------------- 1996

60.


i)

Hooke’s law

ii) Pascal’s law


1995

61.


Young’s modulus


1994

62. State Archimedes Principle. Describe the experimental verification of the law 1994

63.


Elasticity


1993

64. The irregular motion of small suspended particles in air and water is called

Brownian Motion 1993






Kanwer M. Nabeel


Chapter – 11 : HEAT


1.

Why it is more dangerous to burn from steam than from boiling water although

both are at same temperature. (Reason)

or

Steam produces more severe burn on the body than the hot water. Why

(Reason)

2.

On Television it was announced that 300C temperature of Lahore. How much

this temperature will be in Fahrenheit and Kelvin scales

( Answer : 860F and 303 K )

3.

At what temperature Celsius and Fahrenheit temperatures would be equal.

( Answer : -400 )

4. Transfer of heat takes place from Hot to cold body due to difference in their

temperatures

5. Expansion of liquids is greater than solids

6. Alcohol colored as red is used in thermometer

7. Why mercury is used in thermometers? (Reason)

8. The anomalous expansion / contraction of water is at 0

0C to 4

0C temperature

9. The marine life exists in very cold regions due to anomalous expansion of water

10. Pressure is inversely proportional to volume of a gas is Boyle’s law

11.

Volume of a gas is directly proportional to its temperature is Charles Law

12.

A steel bridge is has 1000m length at 350C. If the temperature is -15

0C , what

will be its length . The coefficient of linear expansion is 13x10-6

K-1

.

( Answer : 999.35 m )

13. Expansion of liquids is greater than solids.

14. The absolute zero temperature is 0 Kelvin or -273oC or -460

0F






Kanwer M. Nabeel


15. The ever lowest possible temperature that can be attained is absolute zero

16. Why desert nights are colder whereas days are very hot. (Reason)

17. A copper rod will need less amount of heat to rise its temperature as compared

to iron rod. Why? (reason)

18. Climate of the regions near Sea Shore (e.g.; Karachi) is moderate. Why? (reason)

19. The instrument used to measure temperature is called Thermometer

20. The instrument used to measure degree of hotness or coldness of a body is

called Thermometer

21. The art ( or science ) of measuring temperature is called thermometry

22. Two bodies which can exchange their thermal energy are said to be in thermal

contact

23. Two bodies which are in thermal contact will have same temperature after a

certain time, this state is called thermal equilibrium

24. The law used for determination of specific heat of solids and liquids is Law of

Heat exchange

25.

The art ( or science ) of measuring heat is called calorimetry

Or

The art ( or science ) of measuring specific heat of a substance is called

calorimetry

26. The instrument used for determination of specific heat of solids and liquids is

called calorimeter

27.

According to law of heat exchange ,

Heat released / loss by Hot Body = heat gained / absorbed by cold body

28.

A 50 gm metal piece at 950C is put in 250 gm of water at 17

0C. Final

temperature of water is changed to 19.40C. Find the specific heat of metal

piece.

( Answer : 666.7 J.kg-1

.K-1

)

29. One kg of ice is dropped in 9 kg of water at 50

0C. What will be the final

temperature? Latent specific heat of fusion of ice is 336000 J kg-1

.






Kanwer M. Nabeel


49. Cooking utensils are made up of metals (such as iron , steel) while non-metals

(such as wood, plastic) are used in handles or other holders. Why (Reason)

50. Fur and wool are used to make clothes for winter. Why (reason)

51.

water is used in car radiator. Why (reason)

52. Speeding up the natural convection process is called Forced Convection

53. Speeding up the natural convection process is done by Fans and Pumps

54. Geysers works on the principle of convection

55. Ventilation is a good example of heat transfer by convection

56. Radiation is used in thermography

57. Thermograph is scan or photograph of body according to radiation intensities

of different parts.

58. When water changes into ice it expands

59. Cause of land and sea breeze is greater specific heat of water

60. Tea in a cup becomes cold earlier as compared to teapot. Why? (Reason)

61. When a body absorbs heat its Internal Energy increases.

62. Internal energy is sum of all Kinetic energy and potential energy of all

molecules of a body

63. Any physical property of a substance which changes uniformly with

temperature may be used to measure temperature.

64. Average kinetic energy of molecules is Temperature

65. Temperature is related to internal energy of a body

66.

The lower fixed point of Fahrenheit scale of temperature is 32 oF , and upper fix

point is 212 oF

67. The melting point of ice is 32

oF and boiling point of water is 212

oF on

Fahrenheit scale.

68. The divisions between upper and lower fix points of Fahrenheit scale are 180

69. The lower fixed point of Celsius scale of temperature is 0

oC , and upper fix






Kanwer M. Nabeel


point is 100 oC

70. The melting point of ice is 0

oC and boiling point of water is 100

oC on

Fahrenheit scale.

71.

The divisions between upper and lower fix points of Celsius scale are 100

72. The lower fixed point of Kelvin scale of temperature is 273 K , and upper fix

point is 373 K

73. The melting point of ice is 273 K and boiling point of water is 373 K on kelvin

scale.

74. The divisions between upper and lower fix points of Kelvin scale are 100

75.

The conversion of liquids into vapors / gases at all temperatures is called

Evaporation 2013

76.

How much amount of heat is required to raise he temperature of 800 g of iron

through 500C. Specific Heat of iron is 499.8 J / kg

0C

( Answer: 19992 Joules )

2013

77.

State Boyle’s Law and Charles Law. Also derive P V = n R T

Or

State Boyle’s Law and Charles Law. Also derive general gas equation

2013

78. Evaporation takes place at all temperatures 2012

79.

How much amount of heat is required to raise the temperature of 100gm of

water from 200C to 80

0C? Specific heat of water is 4200 J/kg

0C

(Answer : 25200 J )

2012

80.


Boyle’s Law


2012

81. Define co-efficient of linear expansion and Co-efficient of volumetric expansion.

Write the relation between them.2012

82. How much amount of heat is required to raise the temperature of 100kg of iron

through 100C? Specific heat of water is 499.8 J/kg

0C

2011






Kanwer M. Nabeel


(Answer : 499800 J )

83. State Boyle’s Law, Charles Law and Pressure law. Also derive P V = n R T 2011

84.

The maximum density of pure water is at temperature of 40C 2010

85.

117.6J heat is required to raise the temperature of 10gm of silver by 500C. Find

the specific heat of silver.

(Answer : 235.2 J/kg-K )

2010

86. Define evaporation. Write down any four factors on which evaporation

depends.2010

87. Write two differences between Heat and temperature 2009

88.


Law of heat exchange


2009

89. State Boyle’s Law and Charles Law and write the formula of general gas

equation2009

90.

Define the following terms

i)

Co-efficient of linear expansionii)

Specific Heat

iii) Regelation


2009

91. Why gaps are left between two pieces of a railway track. (Reason) 2009

92.

Steam produces more severe burn on the body than the hot water. Why

(Reason)

Or

Why it is more dangerous to burn from steam than from boiling water although

both are at same temperature. (Reason)

2008

93. Draw a labeled diagram of a refrigerator and describe the working of its main

parts.2008

94. Define evaporation. Write down any four factors on which rate of evaporation

depend.2008






Kanwer M. Nabeel


95. Write two differences between Heat and temperature 2007

96.




2007

97.


Specific Heat


2007

98.



0C? Specific heat of water is 4200 J/kg

0C

(Answer : 21000 J )

2007

99. Write the effect of pressure on the boiling point and melting point of a solid.

Explain one of these with the help of an example.2007

100


Specific Heat


2006

101

Why should liquid used in thermometer be a good conductor of heat?

(Reason)2006

102 Explain the working of main parts of a refrigerator with the help of a diagram. 2006

103 The heat energy involved in the change of state is called Latent heat. 2006

104

Write two differences between Heat and temperature 2005

105


iron through 100C? Specific heat of water is 499.8 J/kg

0C

(Answer : 499.8 J )

2005

106 State Boyle’s Law and Charles Law. Also derive general gas equation 2005

107

How do fish and other aquatic animals survive in extremely cold water in rivers,

lakes and seas? (Reason)

Or

2004






Kanwer M. Nabeel


Marine life survives in frozen area. Why? (Reason)

108

Define evaporation and describe the factors on which evaporation depends. 2004

109

117.6J heat is required to raise the temperature of 10gm of silver by 500C. Find

the specific heat of silver.


2004

110 Write two differences between Heat and temperature 2003

111


Regelation


2003

112

Define the following laws

Pressure Law


2003

113

Show with the help of a neat diagram the important parts of a refrigerator and

write down the working of any one of them.2003

114

The co-efficient of linear thermal expansion of aluminum is 26x10-6 0

C-1

.

Aluminum rod is 2m long at 250C. What will be its length at 750C?

(Answer : 2.0026 m )

2003

115 State Boyle’s Law and Charles Law. Also derive general gas equation PV= nRT 2003

116 Small gaps are left between two adjacent pieces of rails. Why? (Reason) 2002

117

An iron rod is 510cm long at 160C. How long it is at 99

0C If co-efficient of linear

thermal expansion of iron is 12x10-6 0

C-1

What will be its length at 750C?

(Answer : 510.508 cm or 5.105 m )

2002

118


Boyle’s Law


2002

119

Define Anomalous expansion of water and describe its three examples from

practical life.2002






Kanwer M. Nabeel


120


Specific Heat


2001

121

Write down the uses of bimetallic strip and with the help of a diagram explain

its use in fire alarm.2001

122


Charles Law


2001

123

If 117.60J heat is required to raise the temperature of 10gm of silver by 500C.

Find the specific heat of silver.


2001

124 Write two differences between Heat and temperature 2000

125




2000

126

How much amount of heat is required to raise the temperature of 0.1kg of iron

through 100C? Specific heat of water is 499.8 J/kg

0C

(Answer : 499.8 J )

2000

127


i) Regelation

ii) Thermal conductivity


1999

128

Show with the help of a diagram the essential parts of a refrigerator and write

down briefly its working.

Or

With the help of a diagram write down the constructional and working of a

refrigerator.

1999

129 Define the following laws : 1999






Kanwer M. Nabeel


Charles Law


130

An iron rod is 51 cm long at 160C. How long it is at 99

0C If co-efficient of linear

thermal expansion of iron is 12x10-6 0C-1 What will be its length at 750C?

(Answer : 51.051 cm or 0.51051 m 51.036 cm )

1999

131

Define co-efficient of linear expansion and Co-efficient of volumetric expansion.

Write their formulae.1998

132

How much heat is required to raise the temperature of iron of 200gm from

200C to 80

0C? The specific heat of iron is 500 J/kg-

0C.

(Answer : 6000 J )

1998

133


i) Boyle’s Law

ii) Law of heat exchange


1998

134

Write any two effects of anomalous expansion of water 1998

135


co-efficient of linear expansion


1997

136

Describe a method to determine the specific heat of lead shots. 1997

137

Calculate the amount of heat required to raise the temperature of 500gm of


0C

(Answer : 126000 J )

1997

138

Write the effects of pressure on boiling point of a liquid. Describe an

experiment to prove one of the effects.1997

139




1996

140 Write down the eight factors on which rate of evaporation depend. 1996






Kanwer M. Nabeel


Or

Write down eight factors on which evaporation depends.

141

How much wills a brass rod of 20m expands when it is heated from 100C to

300C. The coefficient of linear expansion of brass is 19x10-6 K-1 .

(Answer : 20.0076 m)

1996

142

Evaporation takes place at all temperatures 1995

143


i) Regelation

ii)

Latent heat of vaporization


1995

144

A 600gm of iron piece at 1000C is drooped into 200gm of water at 20

0C. The

temperature of the mixture is 410C. find the specific heat of iron.

(Answer : 498.305 J / kg-0C)

1995

145

Define the co-efficient of linear expansion and derive the relation.

α =

x

1995

146




1995

147 One calorie = 4.2 Joules 1994

148

A brass rod of length 3.0m at 00C is heated to 100

0C. What would be its length if

the coefficient of linear expansion of brass is 19x10-6

K-1

.

(Answer : 3.0057 m)

1994

149


i)

Evaporation

ii) Diffusion


1994






Kanwer M. Nabeel


150

With the help of a diagram write down the constructional and working of a

refrigerator.

or

Show with the help of a diagram the essential parts of a refrigerator and writedown briefly its working.

1994

151

Differentiate between specific heat and latent heat 1994

152

What is meant by anomalous expansion of water? Write an experiment which

shows that density of water is maximum at 40C.

Or

What is meant by anomalous expansion of water? Write an experiment which

shows that density of water is maximum at 40C according to survival of marine

life in winter season.

1994

153


Latent heat of fusion of ice

Or

Latent heat of fusion


1994

154 3.36x105 Joule of heat is required to melt one kilogram of ice at 0

0C. 1993

155

Define the co-efficient of linear expansion and derive the relation.

α =

x

where letters have their usual meaning

1993

156


Latent heat of vaporization


1993

157




1993

158 Define the following terms 1993






Kanwer M. Nabeel


Specific Heat


159

500gm of lead shot at 1000C are mixed with 200gm of water at 20

0C. Find the

temperature of the mixture. The specific heat of lead is 128 J/kg-0C and specific

heat of water is 4200 J/kg-0C

(Answer : 25.70C)

1993






Kanwer M. Nabeel


Chapter – 12 : WAVES & SOUND


1. Define simple harmonic motion and verify it with the help of a simple

pendulum.

2. State three characteristics of a musical sound and describe any one of them

3.

The sound of thunder in the sky is heard later than the streak of light although

they are produced at the same time. (Reason)

4. Define wavelength, frequency and velocity of a wave. Derive the equation V=f λ

5. Sound waves are longitudinal waves 2013

6.

Calculate the length of a second’s pendulum. Take g = 10 m/s2

( Answer: 0.994 m )

2013

7. The speed of sound at NTP (Normal Temperature and Pressure) is 336 m/s 2012

8. The wave produced by vibrating a body is called longitudinal wave 2012

9.

The time period of second’s pendulum is 2 seconds 2012

10.


Echo


2012

11. Define loudness of sound. Write three factors on which loudness of sound

depends.2012

12.


i)

Pitch

ii) Frequency

iii) Time period

iv)

Simple harmonic motion

2012

13. Maximum beat frequency that human ear can detect is 7 or seven beat per

second2011

14. Loudness of sound depends upon Area of vibration , amplitude and frequency 2011

15.

Prove that V = f λ 2011






Kanwer M. Nabeel


42.


Loudness of sound


2004

43.

Find the length of a second’s pendulum.

(Answer : 0.994 m)

2004

44.


i)

Frequency

ii) Amplitude

2003

45.

Why is lighting seen earlier than the sound of thunder? (Reason)

Or

The sound of thunder in the sky is heard later than the streak of light although

they are produced at the same time. (Reason)

2003

46.

Write the two differences between

Longitudinal waves and transverse waves.

2003

47.


i)

Construction interference of transverse wavesii)

Resonance

2003

48. Define wavelength and frequency. Derive the relation V = λ f 2002

49.

Write two points of difference between

Musical sound and noise

2002

50.

When a sound wave of frequency 400Hz and wavelength 3m passes through a

medium, calculate the velocity of sound wave in this medium.

(Answer : 1200 ms-1 )

2002


depends.2001

52. Write down two uses of ultrasonic waves 2001

53. Define the following :

i)

Echo

2001






Kanwer M. Nabeel


ii) Frequency

54.


i) Wavelength

ii)

Time period


2000

55.

Write two points of difference between

Musical sound and noise

2000

56.


i) Longitudinal waves

ii)

Periodic motion


2000

57. When a gun is fired its sound is heard a little after seeing the flash. (Reason) 2000

58.


i)

Frequency

ii) Musical Sound

iii) Echo

iv)

Resonance

1999

59.

The pitch of sound depends upon frequency 1999

60.


i) Constructive interference

ii) Transverse waves

1999

61.

Why we do not hear the explosive sounds produced on sun. (Reason)

or

The sound of explosion on the sun is not heard on the earth. (Reason)

1999

62.


Echo


1998

63. Write the two differences between 1998






Kanwer M. Nabeel


Longitudinal waves and transverse waves.

64. Define simple harmonic motion and explain it with an example 1998

65. Define simple harmonic motion and explain it with an example 1997

66.


i)

Resonance

ii) wavelength


1997

67.

Calculate the length of a second’s pendulum. Take g = 9.8 m/s2

( Answer: 0.994 m )

1997


depends.1997

69. The unit used to measure noise is decibel or dB 1996

70.

In MKS system, the unit of intensity of sound is Watt/metre square or W/m2

Or

In SI system, the unit of intensity of sound is Watt/metre square or W/m2

1996

71. Define resonance and give its two examples from dally life. 1996

72.

Write down the characteristics of sound 1996

73.

300 waves pass through a point in 3 seconds. Calculate the wavelength if the

velocity of the wave is 330 m/s. find the wavelength of wave

(Answer : 3.3 m)

1996

74.


i) Amplitude

ii)

Pitch or Pitch of sound


1995

75. Distinguish between Longitudinal waves and transverse waves. 1995

76. What is meant by frequency, wavelength and time period? Prove that V = f λ 1995

77. Mention any four harmful effects of noise 1995






Kanwer M. Nabeel


78.

Define simple harmonic motion and explain it with the help of a simple

pendulum.

Or

Define simple harmonic motion and verify it with the help of a simplependulum.

1994

79. The time period of a seconds pendulum is 2 seconds 1994

80. Define resonance and give its two examples from dally life. 1994

81. Define frequency and wavelength. Prove that V = f λ 1994

82.


i)

Amplitudeii)

Longitudinal waves


1994

83.


i) Simple harmonic motion

ii)

Wavelength


1993

84. Explain the propagation of transverse waves with the help of a ripple tank 1993

85.


i)

Resonance

ii) Intensity of sound


1993

86.

Find the length of a second’s pendulum. Take g = 9.8 m/s2

( Answer: 0.994 m )

1993






Kanwer M. Nabeel


Chapter – 13 : PROPAGATION & REFLECTION OF LIGHT


1.

Write three characteristics of image formed by plane mirror. 2013

2. Define reflection of light. State two laws of reflection. 2013

3. Write three uses of concave mirror 2012

4.

The radius of curvature of a concave mirror is 20cm. where should an object be

placed so as to get its real image magnified twice.

(Answer : 15cm )

2012

5.

Write down three characteristics of the image formed by plane mirror. 2012

6. Convex mirror never gives a real image 2011

7.


i) focal length of a concave mirror

ii) magnification


2011

8.

Draw the ray diagram for the formation of image by plane mirror. 2011

9. Draw ray diagram for image formed by concave mirror and write its

characteristics.2011

10. Convex mirror always forms a virtual , erect and diminished image 2010

11.


i) focal length of a concave mirror

ii)

Irregular reflection

iii)

Radius of curvature


2010

12.

Draw ray diagrams only to show the nature, position and size of the images by a

concave mirror when object is placed at:

i) Centre of curvature of mirror

ii)

Between the centre of curvature and principle focus

2010

13. Draw the ray diagram for the formation of image by plane mirror and write its

2009






Kanwer M. Nabeel


three characteristics.

14.


Regular reflection


2009

15.

An object is placed at a distance of 15cm from a concave mirror of focal length

10cm. find the position and nature of the image formed by it.

(Answer : 30cm image will be real and inverted as image distance i.e ‘ q’ is

positive )

2009

16. Write down four uses of spherical mirrors 2009

17.

Magnification = image distance / object distance or q / p

Or

Magnification = height of image / height of object or hi / ho

2009

18.

A body is kept at a distance of 10cm from a concave mirror. The radius of

curvature of the mirror is 10cm. find the position and nature of image.

(Answer : 10cm image will be real and inverted as image distance i.e ‘q’ is

positive )

2008

19.


Focal length


2008

20.


Real image and virtual image

2008

21.

Draw ray diagrams only to show the nature, position and size of the images by a

concave mirror when:

i)

Object is placed beyond ‘C’

ii)

object is placed between ‘C’ and ‘F’

2008

22.


Focal length


2007






Kanwer M. Nabeel


23.

An object is placed at a distance of 15cm from a concave mirror of focal length

10cm. find the position and nature of the image formed by it.


positive )

2007

24.



2007

25. Draw the ray diagram for the formation of image by plane mirror and write its

characteristics.2006

26.

The image formed by a convex mirror is always virtual, erect and smaller than

the object itself.2006

27.

The radius of curvature of a concave mirror is 20cm. where should an object beplaced so as to get its real image magnified twice.

(Answer : 15cm )

2006

28. Draw the image formed by convex mirror and describe its characteristics (the

object may be placed at any point)2005

29.


Regular and irregular reflection

2005

30. Why are concave mirrors used in head lights of an automobile? (Reason) 2005

31.


i) Pole

ii)

Magnification


2005

32. Define regular and irregular reflection of light and write down two advantages

of irregular reflection of light in practical life.

2004

33. Write down four uses of spherical mirrors 2004

34.

The focal length of a concave mirror is 20cm. where should an object be placed

so as to get its real image magnified four times.

(Answer : 25cm )

2004

35. Write the two differences between 2003






Kanwer M. Nabeel



36.

Show the position, nature and size of the image with the help of ray diagrams

when an object is placed in front of a concave mirror

i)

At centre of curvatureii)

Between the centre of curvature and principle focus.

2003

37. Writer down four characteristics of image formed by plane mirror 2003

38.

The radius of curvature of a concave mirror is 40cm. where should an object be

placed so as to get its real image magnified four times.

(Answer : 25cm )

2002

39.


Real image and virtual image2002

40.


i)

Regular reflection of light

ii) Principle Focus

2002

41. The ratio of the size of the image to size of the object is called magnification or

linear magnification 2002

42.

Draw the ray diagram for the formation of image by plane mirror and write itstwo characteristics.

2001

43.



2001

44.


Focal length of a spherical mirror


2001

45.


Radius of curvature of spherical mirror


2000

46.



2000






Kanwer M. Nabeel


47. Write three uses of concave mirror 2000

48. Derive the equation

using the ray diagram of a concave mirror 1999

49.


Linear magnification or magnification


1999

50.

write two characteristics of image formed by plane mirror 1999

51.


Concave mirror and convex mirror

1999

52.

An object is placed in front of a concave mirror at a distance of 30cm. if the

radius of curvature of the mirror is 20cm; find position and nature of image.


positive )

1999

53.


so as to get its real image magnified three times.

(Answer : 13.33cm )

1998

54.



1998

55.


Principle focus of a concave mirror


1998

56.


Centre of curvature of a spherical mirror


1997

57.


in front of mirror as to get its real image magnified twice.

(Answer : 15cm )

1997

58. Define the following 1997






Kanwer M. Nabeel




59. Define regular and irregular reflection of light and write down two advantages

of irregular reflection of light.

1997

60. When a ray strikes a plane mirror at an angle of 30

0 with normal at point of

incidence, the angle of reflection will be 300

1997

61. When the object is at infinite distance from a convex mirror, the image is

formed at principal focus or focus 1996

62.


Concave mirror and convex mirror

1996

63.



1996

64.

An object is placed at a distance of 8cm from the pole of a concave mirror of

focal length 12cm. find the position and nature of image.

(Answer : -24 cm image will be virtual and erect as image distance i.e ‘q’ is

negative )

1996

65.

Explain with a ray diagram the position, nature and size of the image when anobject is placed in front of a concave mirror

i) Within its focal length

ii) Beyond its centre of curvature

1995

66.

Draw the ray diagram for the formation of image by plane mirror and write its

image characteristics.1994

67.




1994

68. Write four uses of concave mirror. 1994

69.

Show the position, nature and size of the image with the help of ray diagrams

when an object is placed in front of a concave mirror

i)

Object at C

ii)

Object between F and Pole

1993






Kanwer M. Nabeel


70. Write the two differences between Real image and virtual image and draw the

diagram1993






Kanwer M. Nabeel


Chapter – 14 : REFRACTION OF LIGHT & OPTICAL INSTRUMENTS


1. For the total internal reflection the angle of incidence must be greater than the

critical angle2013

2.

Find the focal length of a convex lens if p = 5 cm , q = 10 cm and the image

formed is virtual.

( Answer: 10 cm or 0.1 m )

2013

3. Draw a ray diagram of Compound microscope and describe its working 2013

4.

If q = 6cm and p = 2cm, the magnifying power of lens will increase 3 times

Or

If q = 6cm and p = 2cm, the magnifying power of lens will be 3 times

2012

5. The refractive index of ruby is 1.54 2012

6. The focal length of +2 dioptre convex lens is 50cm 2012

7.

The least distance of vision for a normal human eye is 25cm 2012

8.

The speed of light in water is 2.25x108 m/s

9.

Draw a neat and labeled ray diagram of simple microscope. Write down the

characteristics of the image formed by it and the formula of its magnifying

power.

Or

Draw a neat and labeled ray diagram of Magnifying glass. Write down the

characteristics of the image formed by it and the formula of its magnifying

power.

2012

10. The refractive index of ruby is 1.54 2011

11.

Human eye is similar to camera 2011

12.

Find the focal length of a concave lens if p = 5cm , q = 10cm and the image

formed is virtual.


2011

13. Draw the ray diagram of a compound microscope and write its working. 2011






Kanwer M. Nabeel


14.


Snell’s Law

or

Snell –Descartes law

or

Law of refraction


2011

15. The speed of light in vacuum is 3x108

m/s 2010

16.

A convex lens forms a virtual image of an object placed 5cm away from the

optical centre at a distance of 10cm. determine the focal length of the convex

lens.


2010

17.


Total Internal reflection


2010

18.


i) Refractive index

ii)

Critical angle

iii)

Magnifying glass or Simple Microscope

iv) Power of lens


2010

19.


Refractive index


2009

20. Define total internal reflection with the help of a ray diagram. Write down the

conditions necessary for it.2009

21.

Magnification = image distance / object distance or q / p

Or

2009






Kanwer M. Nabeel


Magnification = height of image / height of object or hi / ho

22. Draw a ray diagram of Compound microscope and explain its working 2008

23.


i) Critical angle

ii) Focal length


2008

24. Define critical angle and total internal reflection. Write down the conditions

necessary for total internal reflection.2007

25.


Focal length


2007

26. Name two main defects of human eye. Show the defects and their corrective

devices with the help of ray diagrams.2007

27. With the help of a ray diagram show the working of a simple microscope

(Magnifying glass) and write the formula for its magnification.2007

28.


i) Critical angle

ii) Short-sightedness


2006

29.

Describe the construction of a compound microscope with the help of a ray

diagram.

Or

Describe the construction and working of a compound microscope with thehelp of a ray diagram.

2006

30.

State the following Laws :

Snell’s law


2006

31. The index of refraction of Ruby is less than the index of refraction of diamond.

Why? (Reason)2006






Kanwer M. Nabeel


32.

The focal length of convex lens is one meter. An object is placed at a distance of

2m before it. Determine the position, magnification and nature of the image.

( Answer: q = 2m , M = 1 , as ‘q’ is positive Image is real and inverted )

2005

33.

Define total internal reflection of light with the help of a ray diagram. Writedown the conditions necessary for it.

2005

34.

Draw a ray diagram of Compound microscope and explain its working 2004

35.

Why concave lens of suitable focal length is used for removal of short-slightness

of the eye. (Reason)

Or

Why concave lens is used for removal of short-slightness of the eye. (Reason)

2004

36.

Describe Short-sightedness and long-sightedness. How are these defects

removed, show by the help of ray diagrams.

Or

What are the main defects of Human eye? How are they removed?

2003

37.


Critical angle


2003

38. The speed of light in air is 3x108

m/s 2003

39.


formed is virtual.


2003

40. Draw a ray diagram of Compound microscope and explain its construction and

working2002

41.

State the following Laws :

Snell’s law


2002

42. The ratio of the size of the image to size of the object is called magnification or

linear magnification 2002






Kanwer M. Nabeel


43. Write the two differences between convex lens and concave lens 2001

44.

The focal length of a convex lens is 50cm; an object is placed at a distance of

25cm from the lens. Determine the position and nature of the image.

( Answer: -50 cm or -0.5 m, as ‘q’ is negative so the image is virtual and erect )

2001

45.


Refractive Index


2001

46.


Angle of minimum deviation


2000

47.


formed is virtual.


2000


49.


Critical Angle


1999

50.

Define the following and write their SI unit

Power of a lens


1999

51.


Snell’s Law


1999


53.

What are the main defects of Human eye? How are they removed?

Or

Describe Short-sightedness and long-sightedness. How are these defects

1998






Kanwer M. Nabeel


removed, show by the help of ray diagrams

54.


Angle of minimum deviation


1998


m/s 1998

56.


Power of a lens


1998


58.


Principle focus of a convex lens


1997

59.


Power of a lens


1997

60. Write the two differences between short-slightness and long-sightedness 1997

61. Draw a ray diagram of Astronomical Telescope and describe its working 1996

62.

The focal length of a convex lens is 20cm. where should an object be placed so

as to get its real image magnified four times.


1995

63.


Power of a lens


1995

64. Draw diagrams to show the two defects of the eye and their correction 1995

65. Draw a labeled diagram of Compound microscope 1995

66. The unit of power of a lens is dioptre 1994






Kanwer M. Nabeel


67. The image formed in the human eye is real , inverted and diminished 1994

68. Write the construction of an Astronomical Telescope. Give its working with the

help of a ray diagram.1994

69.


Refractive index


1994

70. Total internal reflection takes place when angle of incidence is greater than

critical angle1993

71. The focal length of a converging lens whose power is 5 dioptres is 20 cm 1993

72.


i)

Refractive index

ii) Persistence of vision


1993

73.

The distance between an object and a screen is 60cm. A convex lens is placed

between them to obtain a real image magnified four times. Find the focal

length of the lens


1993

74.


Laws of refraction of light


1993 `

75.


Principle focus of a convex lens


1993

76.

Write the two differences between Short-sightedness and Long-sightedness and

draw the diagram1993

77. Write the construction of a compound microscope and show its working by a

ray diagram1993






Kanwer M. Nabeel







Kanwer M. Nabeel


Chapter – 15 : NATURE OF LIGHT & ELECTROMAGNETIC SPECTRUM


1.


i) Dispersion of light

ii) Photon

iii)

Rainbow

2013

2.

A ray of light thrown on glass-prism cannot be Focused 2013

3. What is Newton’s Corpuscular theory of light? Write down any two phenomena

which supports this theory2012

4.


Photon


2012

5.


Dispersion of light


2011

6. Describe quantum theory of light 2011

7.


i)

Dispersion of light

ii) Photon

2010

8.

What is Wave theory of light? Write down the phenomena which supports this

theory2010

9.

Describe Newton’s Corpuscular theory of light 2009

10. Define photon and write down its two characteristics 2008

11.


Spectrum


2007

12. The wavelength of red light is greater than the wavelength of violet light. 2007






Kanwer M. Nabeel


13. Define spectrum and describe the waves of which an electromagnetic spectrum

consists.2006

14. Describe quantum theory of light 2005

15.


Rainbow


2005

16. Describe wave theory of light 2004


m/s 2003

18. Write down the quantum theory of light and dual nature of light 2002

19.


Rainbow


2002

20. Write down the Newton’s Corpuscular theory of light 2001

21. Write down the wave theory of light 2000

22.


Polarization


1999

23. Write down the quantum theory of light 1999

24.


Dispersion of light


1998

25. ---------------------------------NONE----------------------------------------------------- 1997

26. When heated a luminous gas or vapors produces a band spectrum 1996

27. ---------------------------------NONE----------------------------------------------------- 1995

28. ---------------------------------NONE----------------------------------------------------- 1994

29. Prove with the help of an experiment that light waves are transverse waves.

1993






Kanwer M. Nabeel


also draw the diagram

30.


Dispersion of light


1993






Kanwer M. Nabeel


Chapter – 16 : ELECTRICITY


1. Three resistances of 3 Ω are connected in parallel their total resistance will be

1 Ω 2013

2.

State the following laws :

i) Coulomb’s law

ii)

Ohms law

iii) Joules law

2013

3.

Three resistances 4 Ω, 6 Ω and 12 Ω are connected in parallel with a source of

6 Volts. Find the current flowing through the circuit.

( Answer: 3 Amp or 3 A )

2013

4. Joule/Coulomb is called Volt 2012

5. The rate of flow of charge in a conductor is called current 2012

6. Write down any three characteristics of resistance connected in parallel 2012

7.

Find the resistance of a bulb, if 0.6A current is passing through the bulb and the

potential difference across the bulb is 90Volt.

( Answer: 150 Ω or 150 ohm )

2012

8.


i) Alternating Current (A.C)

ii) Electric Field

iii) Electrostatic induction

2012

9.

Define capacity of a capacitor. Write down three factors on which capacity of a

capacitor depends. 2012

10. Define Coulomb’s Law. Derive the equation F = K q1 q2 / r2 2012

11.

The substance placed between the conductor plates of a capacitor is called

Dielectric

Or

The substance used as a medium between the two plates of a capacitor is called

dielectric

2011






Kanwer M. Nabeel


12.

Calculate the amount of current passing through an electric heater, if it takes

1800C of charge to heat in 3min.

( Answer: 10 Amp or 10 A )

2011

13.


i) Ampere or Unit of Electric Current

ii) Volt or Unit of Potential difference

iii)

Farad or Unit of Capacitance of a capacitor

iv) Ohm or Unit of Electrical Resistance

2011

14. If I = 1.5 amps, and R = 10 ohms then V = 15 volts 2010

15. What is an electric capacitor? Write down three factors upon which its capacity

depends.2010

16.

A 100 Watt bulb operates in a 220 V circuit. Find the current through the bulb

( Answer: 0.45 Amp or 0.45 A or 0.45 Ampere )

2010

17.


Direct Current (D.C)


2009

18.

The unit of charge is coulomb

Or

The unit of electric charge is coulomb

2009

19. State and explain Coulomb’s law. Derive the equation F = K q1 q2 / r2 2009

20.

The unit of current is Ampere

Or

The unit of electric current is Ampere

2009

21. Write down any three characteristics of resistance connected in Series. Also

draw the diagram for series resistances.2009

22.

Find the potential difference between two ends of a conductor if its resistance

is 5 ohms and current of 500 milliampere is passing through it.

( Answer: 2.5 Volts or 2.5 V )

2009






Kanwer M. Nabeel


23.




2008

24. The device which collects the charge is called capacitor 2008

25.

Write two points of differences between

Direct Current (D.C) and Alternating Current (A.C)

2008

26. Define Coulomb’s law and derive its formula. 2008

27.

The substance used as a medium between the two plates of a capacitor is called

dielectric

Or

The substance placed between the conductor plates of a capacitor is called

Dielectric

2008

28.

Find the current passing through the heater which has resistance of 20 ohms,

and a potential difference of 220 V is supplied to it.

( Answer: 11 Ampere or 11 Amp or 11 A )

2008

29.



ii) Fuse


2007

30. Joule / Coulomb or J / C is the Unit of Voltage or V 2007

31.



2007

32.

Find the potential difference between two ends of a conductor if its resistance

is 5 ohms and current of 500 milliampere is passing through it.

( Answer: 2.5 Volts or 2.5 V )

2007

33.




2006






Kanwer M. Nabeel


34.

What is the current through a conductor of resistance 19 ohms when the

potential difference across it is 120 V?

( Answer: 6.315 Ampere or 6.315 A or 6.315 Amp )

2006

35.

The commercial unit of electrical energy is Kilowatt-Hour 2006

36.


i) Coulomb’s law

ii)

Ohms law

iii) Joules law

2006

37.


Insulator and Conductor

2005

38. Draw a diagram of series and parallel combination of resistances. Write down

the two characteristics of resistances connected in parallel.2005

39.

Find the resistance of an electric bulb if 0.6 A of current is passing through with

potential different of 90 V.

( Answer: 150 Ω or 150 ohm )

2005

40.


i)

Coulomb (unit of quantity of charge)

ii)

Electric field


2004

41. What is capacitor? Write the factors on which its capacity depends. 2004

42. 1 microfarad = 10-6

or 1/1000000 or 0.000001 farad 2004

43.

A 100 watt bulb operates in a 220 volt circuit. Find the current passing through

the circuit.

( Answer: 0.454 Amp or 0.454 A or 0.454 Amperes )

2004

44.



2003

45.

Find the potential difference between two ends of a conductor if it offers a

resistance of 5 ohms when a current of 5 amperes passes through it

( Answer: 25 Volts or 25 V )

2003






Kanwer M. Nabeel


46.


i)

Ampere or Unit of electric current

ii) Farad or Unit of Capacitance of a capacitor


2003

47. The charge flowing through a conductor in unit time is called current or electric

current 2003

48. State Ohm’s law 2002

49.



2002

50. An electric bulb with a current of 0.06A is left lighted for 15 minutes. How muchelectric charge passes through the filament of the bulb?

( Answer: 54 Coulombs or 54 C )

2002

51. Write down any two characteristics of the resistances connected in series. 2002

52. One Milli ampere = 10-3

or 1/1000 or 0.001 ampere 2002

53.


i) Unit of Electric potential or Volt

ii) Resistance


2001

54.

Two resistances of 8 ohms and 12 ohms are connected in parallel with a battery

of 6 volts; calculate the current through each resistance

( Answer: 0.75 A , 0.5 A or 0.75 A , 0.5 A )

2001

55. With the help of a diagram wire down the construction and working of a

parallel plate capacitor.

2001

56. State Coulomb’s law and Joules Law 2001

57. State Ohm’s law 2000

58.

Find the resistance of a conductor if a current of 25 milli ampere is drawn from

120 Volt supply.

( Answer: 4800 ohm or 4800 Ω )

2000






Kanwer M. Nabeel


59.



2000

60.


Unit of charge or unit of quantity of charge or Coulomb


2000

61.


Intensity of electric field


1999

62.

Define an Electric circuit. Write down any three characteristic of resistances

connected in parallel.1999

63.

An electric heater has a resistance of 20 ohms and it works when a potential of

220 volt is applied across its terminals. Find the current passing through the

heater and its power rating.

( Answer: 11 Amp or 11 A , 2420 Watt or 2420 W )

1999

64.

Define the following and write their SI units:

i)

Capacitance

ii)

Electric current or Current


1999

65.


i) Farad

ii)

Ampere

1999

66. State Coulomb’s Law 1999

67.


Polarization or polarization in electric circuits / fuse


1999

68.



1998

69.

State the following laws 1998






Kanwer M. Nabeel


i) Coulomb’s law

ii) Ohm’s Law

70.


i)

Capacitorii)

Unit of current or Ampere

1998

71.

A 100 watt bulb operates in a 220 volt circuit. Find the current passing through

the bulb and find the resistance.

( Answer: 0.454 Amp or 0.454 A or 0.454 Amperes , 484.5 ohm or 484.5 Ω )

1998

72.


Unit of potential difference or Volt


1998

73.

Draw the diagrams showing three resistances R1, R2 and R3 connected in series

and parallel. Also write the characteristics of any one of them.

Or

Draw the diagrams showing three resistances connected in series and parallel.

Also write the characteristics of any one of them.

1998

74.

By increasing the length of a conductor its resistance increases 1997

75.


i)

Capacity of a capacitor or capacitance

ii)

Ampere or Unit of current

1997

76.

An electric lamp is marked 12V and 24W. How many joules does it consume in

one hour? And what is the current passing through the lamp.

Or

An electric lamp is marked 12V and 24W. How much energy does it consume in

one hour? And what is the current passing through the lamp.

( Answer: 2 Amp or 2 A or 2 Amperes , 86400 Joules or 86400 J )

1997

77.

Prove that

if resistance are connected in parallel1997






Kanwer M. Nabeel


78.

State the following laws

i)

Coulomb’s law

ii) Ohm’s Law

1997

79.


i) Electric Field

ii) Electric Power

1997

80.



1997

81.

A building has 5 electric bulbs each of 100 watts, 10 fans each of 60 watts, 10

tube-light each of 40 watts and 1 electric iron of 1000 watts. Find the number of

units used in 30 days, if each of the bulbs, fans, tube-lights and electric iron areused 4 hours a day. Find also the expenditure if electric rate is per unit is 90

paisa. (Or Also find the cost of energy per month at the rate of 90 paisa per

unit)

( Answer: 300 units or 300 kWh , 27000 paisa or 270 Rps )

1997

82. Write down advantages of fuse 1996

83.


Resistance and Conductance

1996

84.

Two resistances of 8 ohms and 12 ohms are connected in parallel with a battery

of 6 volts; calculate the current through each resistance

( Answer: 0.75 A , 0.5 A or 0.75 A , 0.5 A )

1996

85. State Coulomb’s law 1996

86. Define capacitor and with the help of a diagram write down the construction

and working of a parallel plate capacitor.1996

87. A current of 0.3 ampere flows through a wire made of nichrome. When a p.d of

0.6 volts is applied across its ends, the resistance of the wire is 2 ohms or 2 Ω 1996

88. The current obtained from a battery is always D.C or Direct Current 1996

89. The commercial unit of electrical energy is kilo-watt-hour or kWh 1995

90. Show by diagram how three resistances are connected in parallel. And write

down three characteristics of this combination1995






Kanwer M. Nabeel


91.


i)

Current

ii) Capacitance

iii) Resistance

1995

92.

A 12 microfarad (or µF) parallel plate capacitor is charged till the potential

difference between its plates is 250 volts. Find the energy stored in it.

Or

A 12 microfarad (or µF) parallel plate capacitor is charged till the potential

difference between its plates is 250 volts. Find the energy stored in its electric

field.

( Answer: 0.375 J Or 0.375 Joules )

1995

93.


i)

Coulomb’s law

ii) Ohms law

iii) Joules law

1995

94. Define electric Power. Write its formula and unit 1995

95.

A house is fitted with ten 40 watts tube-lights, five 60 watt fans and five 100

watts bulbs. Calculate the units of electrical energy consumed in the month ofApril 1995 if all the appliances were used for 6 hours daily. Also find the cost of

energy per month at the rate of 50 paisa per unit.

Or

A house is fitted with ten 40 watts tube-lights, five 60 watt fans and five 100

watts bulbs. Calculate the units of electrical energy consumed in a month of 30

days if all the appliances were used for 6 hours daily. Also find the expenditure

if electric rate is 50 paisa per unit.


1995

96. The commercial unit of electrical energy is kilo-watt-hour or kWh 1994

97. State Ohm’s law. Write down any three factors on which resistance of a

conductor depends1994

98.

Define capacitance of a capacitor and write down the factors on which it

depends.1994







Kanwer M. Nabeel




100



ii) Volt or Unit of Potential difference

iii) Coulomb or Unit of Electric Charge

iv)

Ohm or Unit of Electrical Resistance

1994

101

State Joule’s law and derive the equation “W = I2Rt” where the letters have

their usual meaning.1994

102

Two points charges of +2 micro-coulomb (or µC) and -5 micro-coulomb (or µC)

are placed at a distance of 50cm form each other. Find the force of attraction

between them. K = 9x109 N.m

2/C

2

( Answer: -0.35 Newton or -0.35 N )

1994

103

A house has six 100 watts bulbs, which are in use for five hours daily. Compute

the electrical energy consumed in 30 days. Also find cost of energy per month if

rate is 50 paisa per unit.


1994

104

The unit of conductance is

Siemens or S or ohm-inverse or Ω-1

or Mho or

Or

The SI unit of Conductance is Siemens or S

1993

105

Three resistors of 3 ohms each connected in parallel have a combined

resistance of 3 ohms or 3 Ω 1993

106


i)

Ampere or Unit of Electric Current

ii) Ohm or Unit of Electrical Resistance

1993

107


i) Coulomb’s law

ii) Ohms law

1993

108 Define the following : 1993






Kanwer M. Nabeel


i) Capacitor

ii) Volt or Unit of potential difference

109

Define series and parallel combination of resistances and derive

where R is combined resistance and R1,

R2, R3 are the resistance joined in series

1993

110

If 0.05 milli-ampere (of mA) of current is passing through a conductor and the

potential difference across it is 25Volt. Find the value of its resistance

( Answer: 500000 Ω or 500x103 Ω or 500 k Ω or 500000 ohms or 500x10

3

ohms or 500 kilo-ohms )

1993






Kanwer M. Nabeel


Chapter – 17 : MAGNETISM & ELECTROMAGNETISM


1. To measure potential difference (or p.d ) the voltmeter is always connected in

parallel with circuit2013

2. What is an Ammeter? How a Galvanometer is changed into an Ammeter? Also

state how an ammeter is connected in an electrical circuit.2013

3. With the help of a labeled diagram, explain the construction and working of an

Electric Bell.2013

4. The relation between Magnetic Filed and Electric current was discovered by

Christian Oersted

2012

5. Draw a labeled Diagram of Electric bell 2011

6.

Define the following:

Magnetic Field


2011

7.

Shunt converts a galvanometer into an ammeter

Or

Shunt Resistance converts a galvanometer into an ammeter

2010

8.

What is an electromagnet? Illustrate it with the help of a labeled diagram and

write down its two uses.

Or

What is an electromagnet? Draw labeled diagram and write down its two uses.

2010

9.

Write down four similarities between electrostatics and magnetism

Or

Write down four similarities between static electricity and magnetism

2010

10.


Electromagnet


2009

11.

With the help of a labeled diagram, explain the working of an electric bell 2008






Kanwer M. Nabeel


one use of each

26. Repulsion is a surer test of magnetism 2003

27. What is a Galvanometer? How is it converted to an Ammeter and Voltmeter 2003

28. Draw neat and labeled diagram, of an Electric Bell. And show the path of

current through it.2003

29. State Maxwell’s Right hand rule 2002

30. With the help of a labeled diagram, explain the construction and working of an

Electric Bell.2002

31. Write down any two methods of demagnetization 2002

32. It is not possible to measure the alternating current with the help of a moving

coil galvanometer. Why? (Reason)2002

33. Write down the factors on which the magnetic force between two poles of a

magnet depends.2001

34. Describe an experiment to show that a magnetic field is formed around a

current carrying wire.2001

35.


Magnetic Field


2000

36. The instrument used to measure potential difference is called Voltmeter 2000

37. Describe any one method of making a magnet 2000

38. State Maxwell’s Right hand rule 2000

39.

Write down four similarities between static electricity and magnetism

or

Write down four similarities between electrostatics and magnetism

2000

40. Draw neat and labeled diagram, explain the working of an Electric Bell. 1999

41.

Write two differences between

Ammeter and Voltmeter

1999






Kanwer M. Nabeel


42.


Magnetic Field


1998

43.

The effective region around a magnet is called Magnetic field

Or

The region in which magnetic effect of a magnet can be experienced is called

Magnetic field

Or

The region in which magnetic force of a magnet can be experienced is called

Magnetic field

1997

44. How a Galvanometer be converted to an Ammeter and Voltmeter 1997



46. State Fleming’s Left hand rule 1996

47.

Write two differences between

Ammeter and Voltmeter

1996



49. Write down four properties of magnetic lines of force 1995

50.


Magnetic Field


1994

51. How a Galvanometer be converted to an Ammeter and Voltmeter 1994

52. Write down the properties of magnetic lines of force 1994

53.

Draw a labeled circuit diagram of an Electric Bell and write its working.

or

Draw neat and labeled diagram, explain the working of an Electric Bell.

1993






Kanwer M. Nabeel


54. Write the construction and working of a Weston Galvanometer and draw its

diagram.1993






Kanwer M. Nabeel


Chapter – 18 : ELECTRONICS


1.


i) Electronics

ii) Doping

iii)

Rectification

2013

2.

Write two differences between p-type substances and n-type substances 2013

3. What is transistor? Describe two types of transistors with the help of diagram. 2012

4.


Doping


2012

5. Amplification can be obtained by Transistor 2011

6. What is transistor? Write its two advantages. 2011

7.


Doping


2011

8. What is Radar? Write its three uses. 2011

9. The rectification is obtained by semi-conductor diode or diode 2010

10. Define rectification. Describe the working of a semiconductor diode as a

rectifier.2010

11.


i)

Radar

ii) Transistor

2009

12.


P-type substance and N-type substance

2009

13. Write three advantages of transistor 2008

14.

Define the following 2008






Kanwer M. Nabeel


Doping


15.


Rectification


2007

16.



2007

17.



2006

18. What is Radar? Write its three uses. 2006

19. What is transistor? Describe two types of transistors with the help of diagram. 2005

20. Holes are the charge carriers on P type material 2005

21.


Radar


2005

22.


Forward Bias and Reverse Bias

2004

23. What is Radar? Write its two uses. 2004

24. The semi-conductor doped with penta-valent element is called N-Type

substance2004

25.

Write down the construction of a transistor and describe its function as anamplifier.

2003

26.


Amplification


2003

27. Write any three uses of Radar. 2003






Kanwer M. Nabeel


28.


i)

Doping

ii) N-type substances

iii) P-type Substances


2003

29.



2002

30.


i) Doping

ii)

Rectifier


2002

31. Write two uses of Satellite 2002

32.

Explain the working of a P-N junction diode as a rectifier.

Or

Explain working of a diode as a rectifier

2001

33. Define transistor and state its two types 2001

34.


P-N junction diode


2000

35.


Forward Biased and Reverse Biased

2000

36.

Write down three merits of a transistor

Or

Write down three advantages of a transistor

2000

37.



1999

38. Define Radar? Write its uses in daily. 1999






Kanwer M. Nabeel


39.


i)

Doping

ii) Rectification


1999

40.


i)

Doping

ii) Radar


1998

41. Define a transistor explain its working 1998

42.



1998

43. P-N Junction behaves as a two electrodes 1998

44. --------------------------------------None--------------------------------------- 1997

45. --------------------------------------None--------------------------------------- 1996

46. --------------------------------------None--------------------------------------- 1995

47.

--------------------------------------None--------------------------------------- 1994

48. --------------------------------------None--------------------------------------- 1993






Kanwer M. Nabeel


Chapter – 19 : NUCLEAR PHYSICS


1. The elements having atomic number greater than 82 are called radioactive

elements 2013

2.

The half life of radium is 1600 years. Find the amount of radium left after 4800

years. If it’s mass is 60 g (or gm) .

(Answer : 7.5 gm or 7.5 g or 0.0075 kg)

2013

3. Write two differences between fission reaction and fusion reaction 2013

4. The lightest particle in an atom is electron 2012

5. Write three differences between α-particles and β-particles 2012

6.


i) Proton

ii) Nuclear Reactor

(This question contains other terms from other chapters)

2012

7.

Define Radio isotopes. Write the uses of following radio isotopes in medicine.

i) Co-60

ii) I-131

iii)

P-32

2012


elements 2011

9.


Half life of radioactive element


2011

10.

In a nuclear reaction 9x1010

J of energy is released due to conversion of mass

into energy. How much mass is converted into energy. The value of speed of

light is 3x108 m/s

( Answer: 1x10-6

kg or 0.000001 kg )

2011

11. Define radio isotopes and state its one use in agriculture and two uses in

medicine.2011






Kanwer M. Nabeel


12. Define fission reaction. Write down its equation and draw the diagram for chain

reaction.2011

13. Gamma rays are electromagnetic radiation 2010

14.

Write down 3 precautions to minimize radiation hazards

Or

Write down 3 precautions to minimize the danger of radiation

2010

15. What is natural radioactivity? Write down four properties of Alpha particles 2010

16. Write down four properties of Alpha particles 2009

17.


Half life of an element or Half life of radioactive element


2009


elements 2009

19.


Fission reaction and fusion reaction


2009

20.


i)


ii)

α-particles and β- particles

2008

21. The number of protons in a nucleus is called atomic number 2008

22. Define radio isotopes and state its three uses in industry. 2008

23.


Half life of an element or Half life of radioactive element


2007

24. The charge on an electron is 1.6x10-19

coulomb 2007

25. Name four radio isotopes and write their uses in the field of medicine. 2007






Kanwer M. Nabeel


26.

Write down three characteristics of Alpha particles

Or

Write down three properties of Alpha particles

2007

27.




2007

28.

How much energy is released due to conversion of 15gm of mass into energy

when the speed of light is 3x108 m/s?

(Answer : 0.135x1016

J or 1.35x1015

J)

2006

29.

Why is a radioactive substance placed in a lead box with lid made of lead?

(Reason)

2006

30. In fusion reaction two lighter nuclei are combined to form a heavy nucleus. 2006

31. Write down four properties of Alpha particles 2006

32.

Write down three properties of Gamma (γ) rays 2005

33.


i)

Nuclear fusion

ii) Half life of an element


2005

34.

Define radio isotopes and state its one use in following fields

i)

Agriculture.

ii) Medicine.

iii) Industry

2005

35.


α- particles and β-particles

2004

36. Define nuclear fission and describe the chain reaction. 2004

37.


i)

Half life of an element

ii) Nuclear reactor

2004






Kanwer M. Nabeel


iii) Radioactive isotopes

38.


fusion reaction


2003

39.


α- particles and β-particles

2003

40.

Write down any two uses of radioisotopes in the field of agriculture 2003

41. Gamma rays are not deflected by an electric field or magnetic field. 2002

42.


i)

Nuclear Fusion

ii)

Nuclear Reactor


2002

43. Write down two uses of radioisotopes 2002

44. Einstein proposed the theory of interconvertibilty of mass and energy according

to the equation E = mc2

2002

45.

Half life of radon is 382 days. How much of 100 gram of sample of radon is left

after 764 days.

(Answer : 25 gram or 25 gm)

2001

46. Write down three properties of Gamma (γ) rays 2001

47.


i) Atomic Mass number

ii)

Radio isotopes

2001

48.

Write down 3 precautions to minimize the danger of radiation

or

Write down 3 precautions to minimize radiation hazards

2001

49. The mass of a proton is nearly equal to mass of neutron 2001

50.

The emission of invisible radiations from uranium is called Radioactivity 2001






Kanwer M. Nabeel


Or

The emission of invisible radiations from a nucleus of an element is called

Radioactivity

51.


Radioactivity


2000

52.

Explain the chain reaction in 92U235

Or

Explain the chain reaction with the help of an example of 92U235

2000

53. The quantity of charge on a proton is 1.6x10-19

Coulomb 2000

54.


i)

Nuclear Fusion

ii) Nuclear Reactor


2000

55. Write down three properties of Alpha particles 2000

56.




1999

57. Write down four characteristics of Beta (β) particles

Or

Write down four properties of Beta particles

1999

58.

Write down any two uses of radio isotopes in industry 1999

59. What is fission reaction? Explain the chain reaction in 92U235

1998

60.


Radio isotopes


1998






Kanwer M. Nabeel


61. Write down four characteristics of gamma (γ) rays 1998

62. The time within which the half of the atoms of element decay is called half life

of the element.1998

63.


i)

Radio isotopes

ii)

Radioactivity


1997

64.

Define fission reaction? Explain the chain reaction in 92U235

with the equation

and diagram

Or

Define fission. Describe briefly the method discovered by Hanh and Strassman

to produce the chain reaction in 92U235

. Write its equations and draw the

figures

1997

65.

Write four safety measures against the hazards of radioactive radiations.

Or

Write down four precautions to minimize the danger of radiation

1997

66.

P32 or P-32 or Phosphorus-32 is used in the detection of Brain tumor 1997

67. The mass of the nucleus is about 10-24

gm 1996

68. What is fission? describe the chain reaction 1996

69. Write down four properties of alpha (α) particles and beta (β) particles 1996

70. Write the four uses radio isotopes in the field of medicine. 1996

71.

Write down five properties of alpha (α) particles and beta (β) particles1995

72.


i)

Isotopes

ii) Critical Mass


1995

73. Write down the name of four types of reactor 1995






74. Radio active Iodine-131 or I-131 or I131

is used to treat cancer of thyroid glands. 1995

75.

Differentiate between fission and fusion reaction. 1994

76.


i) Radio Isotopes

ii)

Critical Mass


1994

77. Write down four characteristics of alpha (α) particles and beta (β) particles 1994

78. Alpha or α Particles are strong ionizing agents 1993

79.

Define fission. Describe briefly the method discovered by Hanh and Strassman

to produce the chain reaction in 92U235

. Write its equations and draw the

figures

Or

Define fission reaction? Explain the chain reaction in 92U235

with the equation

and diagram

1993

80.


i)

Fusion reactionii)

Radioactivity


1993

81. What is nuclear reactor? Name four types of reactor. Draw also the labeled

diagram of boiling-water reactor1993

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