Post on 30-Oct-2014
description
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Last Paper’s Questions & New Model Questionsfor Entry Test
Total Questions: 387
GIK Institute,
NUST ,
Agha Khan Medical College,
FAST University,
AIR University
UET and All Medical Colleges
Composed by Shah SabMS from GIK Institute
2
1. From the top of a cliffoverlooking a lake a personthrows two stones. The stoneshave identical initial speed vobut stone1 is thrown downwardat an angle below the horizontalwhile stone 2 is thrown upwardat the same angle above thehorizontal .Neglect airresistance and decide whichstone if either strikes the waterwith the greater velocity
a. both stones strike thewater with same velocity
b. stone1 will strike first andstone 2 later
c. stone2 will strike first andstone 1 later
d. both will not reach thewater surface.
2. A projectile is launched fromand returns to ground level. Airresistance is absent .Thehorizontal range of theprojectile R = 175 m. and thehorizontal component of thelaunch velocity is vox = 25m/s.Find the vertical componentvelocity voy of the launchvelocity
a. Not enough data is givenb. 34 m/sc. 34cm/sd. -34 m/s
3. what is the final value of thehorizontal component vx of theprojectile’s velocity ?(Considerquestion 2)
a. Not enough data is givenb. 34 m/sc. 25m/sd. -34 m/s
4. Suppose you are driving in aconvertible with the top down.The car is moving to the rightat a constant velocity. Asshown in figure you point ariffle straight upward and fire it.In the absence of airresistance, where would thebullet land?
a. behind you ,b. ahead of you orc. in the barrel of the riffle.d. Not enough information
given.5. Suppose you are driving in a
convertible with the top down.The car is moving to the rightat a constant velocity. Asshown in figure you point ariffle straight upward and fire it.In the presence of airresistance, where would thebullet land?
a. behind you , toward therear of the car.
b. ahead of you orc. in the barrel of the riffle.d. Not enough information
given.
6. When a coin is tossed up inthe air, then there are threeparts to the motion of the coin ,on the way up , the coin has avelocity vector that is directedupward and has a decreasing
3magnitude. At the top of its pathcoin immediately has a zerovelocity. On the way down thecoin has a downward pointingvelocity vector with anincreasing magnitude, in theabsence of air ,
a. acceleration of the coil alsochange as velocity
b. acceleration changesduring upward part
c. acceleration changesduring downward part
d. acceleration does notchange throughout themotion.
7. As a projectile movies in itsparabola path , the velocity andacceleration vectors areperpendicular to each other.a. everywhere along its pathb. at the peak of its pathc. nowhere along its pathd. not enough information is
given.
8. An Alaskan rescue plane dropsa package of emergencyrations to stranded hikers .Theplane is traveling horizontally at40.0 m/s at a height of 100 mabove the ground. Where doesthe package strike the groundrelative to the point at which itwas released.?a. 181 mb. 181 cmc. 150md. zero m
9. A long jumper leaves theground at an angle of 20degrees to the horizontal and at
a speed of 11 m/s.How fardoes he jump.a. 384 mb. 7.94mc. 0.722 md. Not enough information
given
10. A passenger at the rear of atrain traveling at 15m/s relativeEarth throws a baseball with aspeed of 15m/s in the directionopposite the motion of thetrain. What is the velocity ofthe baseball relative to Earth?a. zerob. 15 m/sc. 15 m/sd. 30 m/s.
11. Suggest, how can you throw aprojectile so that it has zerospeed at the top of itstrajectory?a. throw it at angle less than
90b. throw it an angle greater
than 90c. throw it an angle of exact
90 with horizontald. throw it an angle of exact
12. You are talking byinterplanetary telephone to afriend who lives on the Moon.She tells you she has just won1 Newton of gold in a contest.Excitedly, you tell her that youentered Earth’s version of thesame contest and also won 1Newton of gold who is richer?a. your friendb. youc. it’s a draw
413. A clever monkey escapes from
the zoo. The zoo keeper finshim in a tree. After failing toentice the monkey down , thezoo keeper point hertranquilizer gun directly at themonkey and shoots .The clevermonkey lets go at the sameinstant the dart leaves the gunbarrel , intending to land on theground and escape. Thena. dart always hits the
monkey regardless of thedarts muzzle velocity
b. dart always hits themonkey depends on thedart’s muzzle velocity
c. dart will not hit monkeyd. not enough information
given.
14. Two trains each having a speedof 30 km/h are headed at eachother on the same straighttrack. A bird that can fly 60km/h , flies off the front of onetrain when they are 60 km apartand heads directly for the othertrain. On reaching the othertrain it flies directly back to thefirst train and so forth. What istotal distance?a. 90 kmb. 30 kmc. 120 kmd. 60 km/h
15. On two different tracks thewinner of one kilometer raceran their races in 2a. min,27.95s and 2
min,28.15s.In order toconclude that the runnerwith the shorter time wasindeed faster how much
longer can the other trackbe in actual length.
b. 3mc. 1md. 1.4 me. 2m
16. An automobile travels on astraight road for 40 km at 30km/h. it then continues in thesame direction for another 40km/h at 60 km/h what is theaverage velocity.a. zerob. 40 cm/sc. 40 m/sd. 40 km/h
17. The magnitude of theacceleration of a moving objectis equal to thea. gradient of a displacement
–time graphb. gradient of a velocity-time
graphc. area below a force-time
graphd. area below a
displacement-time graphe. area below a velocity-time
graph
18. A stone is thrown from P andfollows a parabolic path .Thehighest point reached is T. Thevertical component ofacceleration of the stonea. is zero at Tb. is greatest at Tc. is greatest at Pd. is the same at P and Te. decreases at a constant
rate.
519. A truck is moving forward.
Inside its trailer, a pendulumhangs from the ceiling at restwith respect to the truck. Itmakes an angle of 12 withvertical .Then the speed of thetruck isa. 12 m/sb. 20m/sc. 30 m/sd. We can not calculate the
speed of truck from thegiven information.
20. Which of the following ispossible for a kinetic energyand momentum?a. A system have zero kinetic
energy but non-zeromomentum
b. A system have zeromomentum but non-zerokinetic energy
c. A system can havenegative Kinetic energy
d. None of above is correct
21. A 2-kg particle is located at theorigin and a 1-kg particle islocated on the x-axis at x = 3m.Determine the location of thecenter of mass of this twoparticle system.a. 3mb. 0mc. 1md. None
22. If you are carrying a ballrunning at constant speed andwish to throw the ball so thatyou can catch it as it comesback down should youa. throw the bal at angle of
about 45
b. throw the ball straight in airand you get slowdown tocatch it
c. throw the ball straight andremains standing at thatpoint
d. throws the ball straight inthe air and continue withsame pace.
23. If a the surface of a frozenpond were perfectly smooth sothat it would be impossible towalk across it could you getfrom one part to another by____________ suggest youranswer scientificallya. lying downb. rollingc. jumpingd. crawlinge. None
24. A projectile is fired on Earthwith some initial velocity.Another projectile is fired onethe Moon with the same initialvelocity thena. RM = REb. RM > REc. Rm < REd. None
25. Which of the following is wrongstatementa. sound waves transport
energyb. sound travels in straight
linec. sound waves travel
adiabaticallyd. sound waves travel faster
in vacuum than in air26. When a wave is reflected at a
rarer surface , the change inphase is
6a. 0b. π/2c. πd. 3 π/2
27. Which of the following emitssound of higher pitcha. Mosquitob. Lionc. Donkeyd. Man
28. A man sets his watch by awhistle that is 2 km away. Howmuch will his watch be in error.Given the speed of sound =330 m/s.a. 3sec fastb. 3 sec slowc. 6 sec fastd. 6 sec slow
29. The number of beats heardper second resulting from twovibrationsa. Y1 = Acos 388 πt , Y2 =
Acos384 πt ,b. 4c. 2d. 8e. 4 π
30. If a distant star is comingtoward the earth , then thewavelength of its spectral linesarea. shifted towards higher
wavelengthsb. shifted toward lower
wavelengthsc. not shifted at alld. may shift or may not shift
depending on otherfactors.
31. A source of sound movestowards a stationary listenerwith 1/15th the speed of sound.The ratio of apparentfrequency to real frequency isa. 14: 15b. 15: 14c. 15: 16d. 16: 15
32. At normal temperature andpressure speed of sound in airis 330 m/s .If pressure isdoubled , speed will bea. 165 m/sb. 220 m/sc. 330 m/sd. 465 m/s
33. A tuning fork A of frequency280 Hz gives 5 beats persecond when sounded withanother tuning fork B. Onloading B with a little wax , thenumber of beats per secondbecomes 3 .The frequency ofBa. 275 Hzb. 277 Hzc. 283 Hzd. 285Hz
34. Ultrasonic waves exhibit theproperties ofa. electromagnetic wavesb. transverse wavesc. non-mechanical waved. longitudinal wave
35. If ultrasonic waves and radiowaves have the samewavelength of 1.6 cm , thena. their frequencies are equalb. their velocities are equalc. radio waves have higher
frequency
7d. ultrasonic waves have
higher frequency
36. The range of wavelengths ofthe sound that can be heard bythe human ear isa. 17m to 1.7cmb. 1.7m to 17 cmc. 1.7 m to 1.7 cmd. 1.7 m to 1.7 cm
37. Ultrasonic can be heard by__________ but cannot beheard by _____________a. bats , manb. bats , dogc. man , dogd. man, bats
38. A beam of light coming parallelto itself from infinity has awave-front which isa. sphericalb. cylindricalc. planed. any other shape
39. Newton postulated hiscorpuscular theory on the basisofa. colors of thin filmsb. Newton ringsc. Dispersion of white lightd. Rectilinear propagation of
light
40. Velocity of light according towhich theory is greater than indenser medium than in rarermediuma. corpuscular theoryb. wave theoryc. Electromagnetic theoryd. Quantum Theory
41. Quantum Theory of light wasproposed by
a. Newtonb. Youngc. Maxwelld. Planck
42. Original Huygens’s wavetheory of light could notsatisfactorily explaina. diffractionb. reflection of lightc. interferenced. polarization
43. Wave nature of light does notsupporta. diffraction effectb. photoelectric effectc. interference of lightd. emission or absorption
effect
44. The light waves area. elastic transverse wavesb. longitudinal elasticc. mechanicald. electromagnetic
transverse
45. The range of visible light isa. 4000A---8000Ab. 80000A----0.40 mc. 2000A—3000Ad. 10-14 m –10-12 m
46. The rest mass of photona. infinityb. zeroc. mo/1-v2/c2
d. 4mo
47. The dual nature of light wasenunciated bya. Huygensb. Planckc. Maxwell
8d. De-broglie
48. The phase difference betweenE and B in electromagneticwaves isa. zerob. 90c. 180d. 360
49. All particles of wave-frontvibratea. in same phaseb. in opposite phasec. up and downd. left and right
50. The ratio of E to B inelectromagnetic waves is equaltoa. cb. 1/cc. 4cd. 1/z
51. When a ray of light enter fromair into water then itswavelengtha. decreasesb. increasesc. remains unchangedd. becomes infinity
52. The transverse nature of lightwave is verified bya. reflection of lightb. polarizationc. refractiond. interference of light
53. If amplitude of waves atdistance d from a point sourceis A , then amplitude at adistance 3d is
a. 3Ab. 9Ac. A/9d. A/3
54. A transverse wave is given bythe equation
)1005.0cos(9 txy m for thiswavea. amplitude is 8m and
frequency is 100Hzb. amplitude is 8m and
frequency is 50Hzc. amplitude 8cm and
frequency is 100 Hzd. amplitude is 8 cm and
frequency is 50 Hz
55. The amplitude of a wave isdoubled. Then intensitya. Is doubledb. Is quadrupledc. Remains samed. Is halved
56. If oil of density higher than thatof water is used( in place ofwater) in a resonance tubethen its frequency willa. increaseb. decreasec. remain the samed. depend upon the density
of the material of tube57. The frequency of the third
harmonic of a stretched stringis 294 Hz. Then thefundamental frequency isa. 47 Hzb. 98 hzc. 73.5 Hzd. 54 Hz
58. As an empty vessel is filledwith water, its frequency
9a. increaseb. decreasec. reamisn the samed. non of above
59. Fundamental frequency of anopen pipe of length 1m is equalto the frequency of the firstovertone of a closed pipe oflengtha. 1mb. 1.5mc. 2md. 2.5m
60. A ray of light strikes a glassplate at an angle of 60 .If thereflected and refracted rays areperpendicular to each otherthan index of refraction of glassisa. ½b. 2/3
c. 3/2d. 1.732
61. Which of the followingrepresents Brewster’s Lawa. 1cot p
b. 1cos p
c. 1cos pec
d. 1cot p
62. If the amplitude of the un-polarized light incident on apolarizer is A then amplitude ofthe polarized light transmittedthrough it isa. Ab. A/2c. A/ 2d. None
63. Light waves can be polarizedas theya. are of high frequenciesb. can produce interferencec. can be refractedd. are transversee.
64. Plane polarized light can beproduced bya. mirrorb. a slitc. nicol- prismd. bi-prism
65. when light is polarized theni. its frequency
changesii. its wavelength
changesiii. its velocity changesiv. its intensity
changes
66. A ray of un-polarized light isincident on surface of glassplate of n = 1.54 .If tan 57 =1.54 , angle of refraction isa. 57b. 43c. 90d. 33
67. Which of the following wavescan not be polarizeda. Radio wavesb. UV raysc. X-raysd. Ultrasonic waves
68. Which of the followingphenomena not common tosound and light wavesa. interferenceb. diffraction
10c. coherenced. polarization
69. A body has +4C of charge .Itmeans that it hasa. an excess of 12*109
electronsb. a deficit of 12 *109
electronsc. an excess of 25*1018
electronsd. a deficit of 25 *1018
electrons
70. Which of the following candischarge a certain amount ofcharge on them in shortest timea. sphereb. Cylinderc. Coned. Rectangular pyramid
71. Two point charges one ninetimes as strong as the otherrepel each other with a force of81*10-9 N when placed in airone meter apart .Two chargesarea. + 1nC , + 9nCb. -1nC , - 9nCc. nCnC 9,1 d. + 1 nC , -9 nC
72. The gap in the spark plug is 0.2cm. The potential differenceneeded to produce a sparkgiven that the break down fieldstrength of air is 3*106 V/m willbea. 2000 Vb. 3000Vc. 4000Vd. 6000V
73. A smaller sphere carrying acharge +q1 is placed inside alarger sphere carrying an other
charge + q2. If the two spheresare connected by a copperwire the charge on the smallersphere will bea. q2 –q1b. q1 –q2c. (q1 +q2)/2d. zero
74. A charge placed between twosimilar and opposite charges isslightly displaced from itsequilibrium position .Then it willa. oscillate with respect to
equilibriumb. remain stable in the new
positionc. return back to its initial
positiond. move with uniform velocity
of acceleration
75. A small oil drop of mass 10-6 kgis hanging in at rest betweentwo plates separated by 1 mmhaving a p.d of 490V. Thecharge on the drop isa. 210-11 Cb. 210-8 Cc. 210-6 Cd. 210-9 C
76. A charge Q is placed at themid point of the line joining twosimilar positive equal chargesq and q. The charges q wii bein equilibrium if Q is equal toa. - qb. q/4c. -q/4d. q
77. A proton is moved betweentwo points whose potential
11difference is 20V. The energyacquired by the proton isa. 3210-19 Jb. 3210-16 Jc. 3210-14 Jd. 3210-13 J
78. A cube of side a has charges 4 C at each of the corners. Thepotential at the center of thiscube whose distance from eachcorner is 32 cm will bea. 9 105 Vb. 9 109 Vc. 9 1011 Vd. 721010 V
79. A person standing barefoot onthe ground comes into contactwith a high power line. He islikely toa. experience a mild shockb. experience a moderate
hockc. experience a fatal shockd. remain unaffected.
80. Total electric flux emanatingfrom a unit positive chargeplaced in air is
i.
ii. 1iii. do4
iv. 14 o
81. When 1019 electrons areremoved from a neutral metalplate, the electric charge on itsis (coulomb)a. + 1.6b. – 1.6
c. 10 -19
d. 10 19
82. When a positively chargedconductor is earth connected :a. electrons flow from the
conductor of the earthb. No charge flow occursc. Protons flow from the
conductor to the earthd. Electrons flow from the
earth to the conductor
83. The minimum charge on anobject can bea. once coulombb. one stat- coulombc. 1.610-19 Cd. 3.210-19 C
84. Capacity of a conductordepends ona. the size and shape of the
conductor onlyb. the dielectric medium
surrounding it onlyc. nature of nearby
conductors onlyd. all the above
85. A sheet of plastic is introducedin the space between theplates of a capacitor thena. electric field increases and
capacity decreasesb. electric field decreases
and capacity increasesc. both electric field and
capacity increased. both electric field and
capacity decrease.
86. A current of 16 mA flowsthrough a conductor. The
12number of electrons flowing persecond isa. 1014
b. 1015
c. 10 -17
d. 10 17
87. The resistance of a wire is R.Itis stretched uniformly so that itslength is tripled. The newresistance of the wire isa. 3Rb. Rc. R/3d. 9R
88. A wire of resistance 1ohm isdivided into two halves andboth halves are connected inparallel. The new resistance willbea. 1ohmb. 2 ohmc. 0.5 ohmd. 0.25 ohm
89. Which of the following shownon-ohmic behavior?a. Diodeb. Tungsten wirec. Copper wired. Carbon
90. A piece of copper wire ofresistance R is cut into threeequal parts. They are thenconnected in parallel. Theeffective resistance of thecombination isa. 0.1Rb. 10Rc. 0.01Rd. 100R
91. A number of resistors areconnected in parallel. Theequivalent resistance isa. higher than the highest of
component resistorsb. smaller than the smallest
of component resistorsc. in between the smallest
and highest componentresistors
d. equal to the sum ofcomponent resistors
92. Post office-box works on theprincipal ofa. Galvanometerb. Wheatstone bridgec. Potenio-meterd. Avo-meter
93. P,Q,R and S are theresistances in the four arms ofthe Wheatstone bridge .Thebridge is most sensitive whena. P =Q , and R=Sb. P+Q = R+Sc. P-Q = R-Sd. None
94. Meter bridge is used tomeasurea. chargeb. currentc. resistanced. potential difference
95. In the Wheatstone bridge, Q =10 ohm ; R = 3 ohm ; S =2ohm. Find the P for the fulldeflection of thegalvanometer?a. 5 ohmb. 10 ohmc. 15 ohmd. 20 ohm
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96. Diamond is extremely hardbecausea. it has hight melting pointb. it is insoluble in all solventsc. it is a covalent solidd. it has largest cohesive
energy
97. In good conductors electricity ,the type of bonding isa. metallicb. ionicc. covalentd. Van-der Wall
98. A hydrogen atom is aparamagnetic. A hydrogenmolecule is aa. diamagneticb. paramagneticc. ferromagneticd. anti-ferromagnetic
99. When the number of turns in acoil is doubled without anychange in the length of the coil ,its self inductance becomesa. 4 timesb. 2 timesc. halvedd. remains unchanged
100. A bulb is connected first withDC and the with AC of samevoltage , then it will shine morebrightly witha. ACb. DCc. brightness will be in ratio
1/1.4d. equally with both
101. The voltage of an AC sourcevaries with time according tothe equation V = 100 Sinπt ,where t is in seconds and V isin Volts. Thena. the peak voltage of the
source is 100 voltsb. the peak voltage of the
source is 50 voltsc. the peak voltage of the
source is 100√2d. the frequency of the
source is 50 Hz
102. The rms value of an ac of 50Hz is 10 amp , The time takenby alternating current inreaching from zero tomaximum value and the peakvalue will bea. 3210-19 Vb. 3210-19 Vc. 3210-19 Vd. 3210-19 J
103. Impurity atoms with which puresilicon should be doped tomake p-type semiconductorare those ofa. phosphorousb. arsenicc. antimonyd. aluminum
104. Semiconductor device isconnected in series with abattery and a resistance. Acurrent is found to passthrough the circuit. If polarity ofthe battery is reversed thecurrent reduces almost to zero.The device may bea. a p-n junctionb. a p-type semiconductor
14c. a n-type semiconductord. an intrinsic semiconductor
105. Width of the depletion line in ap-n junction diode
i. increases whenforward bias isapplied
ii. increases whenreverse bias isapplied
iii. decreases whenreverse bias isapplied
iv. Does not dependon biasing
106. In p-n junction diodei. current is the
reverse biascondition isgenerally small
ii. Forward biascurrent is small ascompare to reversebias
iii. Forward current isindependent of thebias voltage
iv. Reverse biascurrent isindependent of thebias voltage
107. Width of depletion region is ofan unbiased p-n junction is ofthe order of
i. μmii. mmiii. cmiv. nm
108. The charge depletion region ina junction diode is due to
i. Minority carriers
ii. Mobile acceptorand donor ions
iii. Fixed acceptor anddonor ions
iv. Majority carriers
109. Forward biasing of a p-njunction offers
i. Zero resistanceii. Low resistanceiii. High resistanceiv. Infinite resistance
110. In forward bias with ofdepletion in a p-n junctiondiode
i. Decreasesii. Increasesiii. remains constantiv. First increases and
then decreases
111. The typical ionization energyof a donor in silicon is
i. 10eVii. 1eViii. 0.1eViv. 0.001eV
112. Which of the followingrepresents the symbol of n-p-ntransistor?
i. (1)ii. (2)iii. (3)iv. (4)
113. When the p-n junction diode isreverse biased, then
i. Potential barrierincreases
ii. Potential barrierdecreases
iii. Current due to biasincreases
iv. None of these
15
114. Which of the followingstatement is not true?
i. the resistance ofintrinsicsemiconductordecreases withincrease oftemperature
ii. Doping pure Si withtrivalent impuritiesgive p-typesemiconductors
iii. Majority carriers inn-typesemiconductors areholes
iv. A p-n junction canact as asemiconductordiode
115. On increase the reverse bias toa large value in a p-n junctiondiode current
i. Increases slowlyii. Remains fixediii. Suddenly increasesiv. Decreases slowly
116. Region of the transistor whichis heavily doped to producelarge number of majoritycarriers is
i. Baseii. Collectoriii. All are equally
dopediv. Emitter
117. In transistor when electronsflow into the emittera. Holes flow out of collector
b. Holes flow out of emitterc. Some electrons flow into
collectord. Some electrons flow out of
collector
118. N-type semiconductor isa. Neutralb. Negatively chargedc. Positively chargedd. None of these
119. Minority carriers present in a p-type semiconductor are due toa. Addition of impuritiesb. Ionization of impuritiesc. Bias voltaged. Thermal agitation
120. A charge q is moving with avelocity parallel to a magneticfield. Force on the charge dueto magnetic field isa. q v Bb. q B/vc. 0d. B v/q
121. An electron of mass m isaccelerated through a potentialdifference of V and then itenters a magnetic field ofinduction B normal to the lines.Then the radius of the circularpath is
a.m
eV2
b.2
2
eB
Vm
c.eB
Vm2
d.Be
Vm2
2
16122. Two particles X and Y having
equal charges, after beingaccelerated through the samepotential differences enter aregion of uniform magneticfields and describe circularpaths of radii R1 and R2respectively. The ratio of themass of X to that of Y is
a. .2
1
2
1
R
R
b.
1
2
R
R
c.2
2
1
R
R
d.
2
1
R
R
123. A proton and a deuteronhaving the same kinetic energyenter a uniform magnetic fieldnormally. If Rp and Rd be theradii of their trajectories, thena. Rp = Rdb. RD = 2RPc. RD = √2 RPd. RP = √2 RD
124. An electron moves along acircle of radius R in a uniformmagnetic field B. If the field issuddenly reduced to B/3, theradius of the circle becomesa. R/3b. R/9c. 3Rd. R
125. A charge q moves with avelocity v in a magnetic field ofinduction B. If theta is the anglebetween v and B , then Lorentzforce is minimum when
a. θ= 0b. θ= 30c. θ = 90d. θ = 120
126. . Of the following particleswhich will describe thesmallest circle when projectedwith the same velocity normalto the lines of induction of auniform fielda. Electronb. Protonc. Deuteron
d. alpha – particle
127. .Two ions of different massesm1 and m2 but having samecharge and kinetic energy areshot normally into a magneticfield. If R1 and R2 be the radiiof circular paths of ions, thenR1/R2 is equal toa.
2
1
m
m
b.1
2
m
m
c.2
1
m
m
d.1
2
m
m
128. A charged particle moves in astraight line through a certainregion of space. The magneticfield in that regiona. necessarily has a
magnitude of zerob. has a zero component
perpendicular to theparticl’s velocity
17c. has a zero component
parallel to the particle’svelocity
d. none of above
129. The north-pole end of a barmagnetic is held near astationary positively chargedpiece of plastic .Is the plastica. attractedb. repelledc. unaffectedd. None
130. As a charged particle movesfreely in a circular path in theprescence of a constantmagnetic field appliedperpendicular to the particlesvelocity , its kinetic energya. remains constantb. increasesc. decreasesd. None
131. A certain solenoid consists of100 Turns of wire and has alength of 10.0cm.find themagnetic field inside thesolenoid when it carries acurrent of 0.500 A.a. 62.8 mTb. 62.8 Tc. 6.28 mTd. zero
132. The equation of state of nmoles of gas is PV = nRT ,where R is a constant .The SIUnit of R isa. j kg-1 K-1
b. j.g-1 K -1
c. J K-1 mol -1
d. J K -1 per molecule
133. Which one of the followingstatement is NOT true aboutheat?a. 4.18 J mechanical work
produce one calorie ofheat.
b. Heat is a form of energyc. Heat can be completely
converted into useful workunder ideal conditions
d. Heat can be reflected frommirror.
134. Which one of the followingstatement is true about a gasundergoing an isothermalchange?a. The temperature of the
gas remains constantb. The pressure of the gas
remains constantc. The volume of the gas
remains constantd. The gas is insulated from
the surroundings
135. Which one of the following istrue about a gas undergoingan adiabatic change?a. The temperature of the
gas remains constantb. The pressure of the gas
remains constantc. The volume of the gas
remains constantd. The gas is completely
insulated from thesurroundings
136. In a thermodynamic process asystem absorbs 1 Kilo-calorieof heat and at the same timedoes 25o J of work. What is
18the change in internal energy ofthe system?a. 250 Jb. 3950 Jc. 4200 Jd. 4450 J
137. A Carnot engine workingbetween 27C and 127C takesup 800 J of heat from reservoirin one cycle. What is the workdone by Engine?a. 100 Jb. 200Jc. 300Jd. 400J
138. A Carnot engine workingbetween 27C and 127C takesup 800 J of heat from reservoirin one cycle. What is theefficiency by Engine
139. 10 %140. 15 %141. 20 %142. 25 %143. A carnot’s engine whose sink is
at a temperature of 300 K and600 K has an efficiency o f 40%.By how much should thetemperature of the source beincreased so as to increase theefficiency of 60 %.a. 250 Kb. 275 Kc. 300 Kd. 325 K
144. Cooking vegetables and otherfood in a pressure cookersavestime and fuel becausea. under increased pressure ,
water can be made to boilat a temperature muchhigher than 100C
b. under increased pressure ,water can be made to boilat a temperature muchlower than 100C
c. heat losses are reduced toa minimum
d. condensation of steam isprevented
145. The temperature of liquid doesnot increase during boiling.The heat energy suppliedduring this process,a. increases the K.E of the
Molecules of the liquidb. increase the Potential
Energy of the moleculesc. increases both the K.E
and Potenital Energy ofthe molecules
d. is merely wasted since noincrease occurs in the totalenergy of the molecules
146. X-rays and γ-rays are bothelectromagnetic waves .Whichof the following statement iscorrect?a. X-rays in general have
smaller wavelength thanrays
b. X-rays in general havesame wavelength asrays
c. X-rays have largerwavelength than rays
d. X-rays in general havesame frequency as rays
147. In Photolectric effect , thework-function of a metal isa. the maximum energy that
has to be spent to liberateelectron from it
19b. the minimum energy that
has to be spent to liberateelectrons from it
c. the energy required tomake it hot
d. the energy required tomake it ionized
148. The change in wavlenght of X-rays photon when it is scatteredthrough an angle of 90 isa. 0.024Ab. 0.012Ac. 0.048Ad. 0.036A
149. The wavelength of visible lightrange is abouta. 400nm--------- 700nmb. 4000nm------- 7000nmc. 40nm------- 70nmd. 4nm------ 7nm
150. The electromagnetic radiationsare in descending order ofwavelengths in the followingsequencea. infrared , radion , X-rays ,
visible lightb. radio waves, infrared
waves, visible light , X-raysc. radio waves, visible light ,
infrared waves , x-raysd. x-rays , visible light ,
infrared waves, radiowaves
151. If the energies of red and bluephotons of light are representedby Er and Eb thena. Er = Ebb. Er > Ebc. Er < Ebd. Er = Eb/2
152. The speed of anelectromagnetic wave isa. μoξob. 1/ μoξoc. √ μoξod. 1/√ μoξo
153. If there were no atmosphere ,the average temperature onearth surface would bea. Lowerb. Higherc. Samed. 0 C
154. The energy of an X-ray photonis 2 KeV , then its frequencygiven bya. 21018
b. 21017
c. 51017
d. 3.210-16
155. The waves related totelecommunication area. infraredb. visiblec. microwavesd. ultraviolet
156. X-rays are simplya. the conversion of kinetic
energy into radiant energyb. conversion of momentum
into radiant energyc. conversion of mass into
energyd. conversion of charge into
radiant energy
157. The fundamental source of anelectromagnetic wave isa. a steady magnetic field
20b. a steady electric fieldc. a varying magnetic fieldd. a continuous oscillations of
electric charges
158. Which of the following has theshortest wavelength ?a. X-rasysb. Gama-raysc. IR raysd. UV rays
159. A man can take pictures ofobjects even the night usinga. visible lightb. sodium lightc. UV lightd. IR light
160. A photographic plate iswrapped in black paper. It willbe affected bya. infrared raysb. visible lightc. UVd. X-rays
161. X-rays area. stream of fast moving
electronsb. stream of neutral particlesc. stream of positive ionsd. electromagnetic radiations
162. The X-rays wavelength rangeisa. 40 A---------4000 Ab. 4000 A --------7000Ac. 0.01 A-------100 Ad. 700 A--------- 10000A
163. A line emission spectrum isalso known asa. molecurlar spectrumb. an atomic spectrum
c. a pure spectrumd. an impure spectrum
164. When objects in a room areexposed to X-rays then theyappeara. blueb. redc. yellowd. invisible
165. An accelerated electric chargeproducesa. beta raysb. alpha raysc. electromagnetic wavesd. none of above.
166. A photo-cell is an apparatuswhich convertsa. light into electrical energyb. electrical energy into lightc. heat into lightd. None
167. The wavelength of the first lineof Balmer series is 6563 A.The wavelength of first line ofLymen Series will bea. 4861 Ab. 25000 Ac. 7500 Ad. 600 A
168. Wavelength of lighton metal A is twice than offalling on metal B .If maximumkinetic energy ofphotoelectrons emitted intwocases isE and E respectivelythena. EkA = E kBb. E kA = 2 E kB/
Shah Sab MS GIK Institute, 6-06-2006 21c. E kA > E kB/2d. E kA < E kB/2
169. The kinetic energy of theelectron in the first Bohr orbit ofhydrogen atom isa. - 13. 6 eVb. 13. 6 eVc. -27.2 eVd. 6. 8 eV
170. If R is Rydberg constant forHydrogen , the wave-number ofthe first line in the Lyman seriesisa. 3R /4b. R /4c. 2Rd. R /2
171. A diffraction pattern is obtainedby using red light. If red light isreplaced by blue light then
172. bands become broader andfarther aparta. bands dispearb. bands become narrow and
croweded together173. no change in band will take
place
174. On increasing the slit width ,the width of central maximuma. increasesb. remains constantc. decreasesd. zero
175. In a Fraunhoffer single slitdiffraction pattern , , as thedistance on either side fromthe central maximum increase, the witdth of the bright bands__________ hile the dwith ofthe dark bands_____________a. remains the same ,
increasesb. increases , remain the
samec. increases , decreasesd. decreases , increases
176. First diffraction minima due toasingle slit of width 10 -14 cmis at θ = 30 , then wavelengthof the light used I sa. 4000 Ab. 5000 Ac. 6000 Ad. 6250 A
177. Phenomena of diffraction oflight was discovered bya. Girmaldib. Fresnelc. Newtond. Hygens
178. Intereference and diffractioncan be considered as twoeffects whicha. are not at all related to one
anotherb. are complementaryc. can never take place
simultaneouslyd. are always produced but
can never be observed onaccount of the smallwavlenght of light
179. A pointer type galvanometercan be converted into anammeter by
Shah Sab MS GIK Institute, 6-06-2006 22connecting__________in__________a. a high resistance , seriesb. a high resitance , parallelc. a low resistance , paralleld. a low resistance , series
180. The most characteristicsproperty of a liquid isa. fluidityb. formlessnessc. elasticityd. volume conservation
181. Fluid pressure isa. a vector quantityb. a scalar quantityc. sometimes scalar ,
sometimes a vectord. none of these
182. A wooden block floats to acertain level in ordinary water,Ina sea water ita. floats higherb. floats lowerc. floats at the same leveld. sinks
183. When a body is immersed in aliquid completely or partially , itexperiences an apparent lossof weight which is equal to theweight of the displaced liquid.This is known asa. Boyle’s Lawb. Bernoulli’s Principlec. Pascal’s Lawd. Archemede’s law
184. A liquid flowing in a streamlinedmotion possesses
a. potential energyb. kinetic energyc. pressure energyd. All of above
185. A gas blows over a hut. Theforce due to the gale on theroof isa. in the upward directionb. in the downward directionc. in the horizontal directiond. zero
186. Every liquid tends to assumespherical shape becase ofa. gravitional forceb. elastic forcec. surface tensiond. viscous force
187. Surface tension has units o fa. N/m2b. N/mc. N-md. N-m2
188. The tip of the nip of an ink penis split becausea. ink may come into contact
with atmosphereb. ink may raise by capillary
actionc. surface tension of ink is
reducedd. surface tension of ink is
increased
189. Viscosity is exhibited bya. solids onlyb. solids and liquidsc. liquids and gasesd. solids , liquids and gases
190. Which of the following has thegreatest viscosity?a. waterb. castor oilc. mecuryd. glycerine
191. A steel ball A and an aluminumball B of same dimensions aredropped in a pond from thesame height at the same
Shah Sab MS GIK Institute, 6-06-2006 23height at the same time . Thenwhich ball reaches the bottomfirst?a. A reaches the bottom firstb. B reaches the bottom firstc. both A and B reach the
bottom simultaneouslyd. can not be predicted
192. At what common temperatureswould a piece of wood and apiece of metal appear equallyhot or equally cold?a. 0 C
193. 100 C194. 37 C195. none of above196. Bernoulli’s theorem is
applicable to
197. stream line flow of a practicalliquid
198. streamline flow of a ideal liquid199. turbulent flow of an ideal liquid200. flow of any kind201. The equation of continuity of
Fluids is: (a is area , V isvolume)
202. aV-1 = constant203. a2/V = constant204. V/a = constant205. a V = constant
206. Very high temperatures can bemeasured by using
207. gas thermometers208. liquid thermometers209. bimetallic thermometers210. radiation pyrometers211. Solids expand on heating. This
is because
212. potential energy of atomsincreases
213. kinetic energy of atomsincreases
214. total energy of atomsincreases
215. none of above
216. A constant volumethermometer operates on theprincipal ofa. Boyle’s Lawb. Charles]’s Lawc. Archimedes Principald. Gay-Lussac’s Law
217. The coefficient of linearexpansion alpha α, coefficientof area expansion beta ß,coefficient of volumeexpansion gamma γ , arerelated asa. α = 2ß = 3 γb. α = ß = γc. α = ß/2 = γ/3d. None
218. Which of the followingstatements are true?a. good emitters of heat are
good absorber of heatb. good emitters of heat are
bad absorbers of heatc. bad emitters are god
absorbers of heatd. bad emitters are moderate
emitters of heat
219. An ideal black body is thatwhicha. absorbs no radiationsb. absorbs radiations of only
infrared regionc. absorbs radiations of only
one ultraviolet region
Shah Sab MS GIK Institute, 6-06-2006 24d. absorbs all wavelengths
ranging from zero to infinity
220. A black skin person ,experiences in comparison towhite skin persona. more hot and more coldb. less hot and less coldc. more hot and less coldd. less hot and more cold
221. A piece of red glass whenheated to red hot state in darkwill appear to bea. redb. greenc. whited. invisible
222. The temperature of a gasincreases by 10 C .What is theequivalent increase on thekelvins scale?a. 10 Kb. 0 Kc. 100 Kd. 273. 90 K
223. If the volume of the gas is to beincreased by 4 times ,a. temperature must be
doubledb. increased by four timesc. at constant temperature ,
the pressure must beincreased four times
d. it can not be increased
224. A bird flying high up in air doesnot cast shadow on the groundbecausea. light rays coming from the
sun are almost parallelb. the ground lies beyoung
the umbral zone of theshadow
c. the size of the bird issmaller than that of earth
d. the shadow is too faint fordetection
225. For a spherical mirrora. R < 2 fb. R > 2fc. R = 2fd. R= and f are not related
226. Which of the following canproduce virtual imagea. concave mirrorb. convex mirrorc. convex lensd. all of these
227. The speed of light wasdetermined for the first time bya. Newtonb. Fizeauc. Galileod. Romer
228. During reflection and refractionat a plane surface , light travelsin the minimum path . This isknown asa. Huygen’s Principleb. Fermat’s Principlec. Snell’s Lawd. Principal of reversibility
229. A fish at the bottom of a lake6m deep. To an observerdirectly above , it appears tobe at 4.5 m .The refractiveindex of water isa. ¾b. 3/5c. 5/3d. 4/3
Shah Sab MS GIK Institute, 6-06-2006 25
230. The critical angle for themedium of a prism is C and theangle of prism is A. Then therewill be no emergent ray whena. A < 2 Cb. A > 2 Cc. A = 2 Cd. A >= 2 Ce.
231. A ray of white light passesthorugh a prism. The ray whichdeviates least isa. violetb. bluec. yellowd. red
232. The brilliance of diamond is duetoa. refraction onlyb. dispersion onlyc. total internal reflectiond. dispersion and total
internal reflection233. A curved mirror has one focus
while a lens has one focuswhile a lens hasa. one focusb. two focic. more than two focid. no focus
234. A convex lens of focal length fproduces a real imagemagnified x times the size ofthe object. Then the objectdistance isa. (x + 1 ) fb. (x -1 ) fc. (x – 1 ) f/ xd. (x + 1) f /x
235. Spherical aberration can beminimized usinga. mechanical stopsb. lenses of large focal lengthc. plano-convex lenses
d. any of these236. Chromatic aberrations in a lens
is due toa. intereferenceb. refractionc. dispersiond. diffraction
237. The final image in anastronomical telescope isa. real and erectb. virtual and invertedc. real and invertedd. virtual and erect
238. If height of man is 6m thenminimum height of a planemirror in which he can see hisfull image isa. 4.5 mb. 6 mc. 7.5 md. 3 m
239. When a ray of light enters aglass slab , thena. its frequency changeb. its frequency and velocity
changec. its frequency and
wavelength changed. its frequency does not
change
240. Optical fibers are based ona. total internal reflectionb. less scatteringc. refractiond. less absorption coefficient
241. For shaving and make upconcave mirrors are preferredbecausea. they produce real image
Shah Sab MS GIK Institute, 6-06-2006 26b. they produce virtual
magnified image when theobject is placed between fand R
c. they produce a virtualmagnified image when theobject is place betweenpole and F
d. they produce a magnifiedimage for all positions ofobject
242. The speed of light in vacuum is3 * 10 8 m/s. The speed of lightin a medium of refractive index2 will bea. 3 * 10 8 m/sb. 1.5 * 10 8 m/sc. 2 * 10 8 m/sd. 6 * 10 8 m/s
243. The image of an objectpositioned at twice the focallength of diverging lens wil bea. of the same size as the
objectb. invertedc. enlargedd. virtual
244. The graph between the objectdistance along X-axis and theimage distance along y-axis fora convex lens isa. a straight lineb. a parabolac. a circled. a rectangular hyperbola
245. The focal length of a convexlens is 2.5 cm. Its magnifyingpower will bea. 25b. 52c. 11d. 1.1
246. The power of convex lens isa. negativeb. positivec. zerod. imaginary
247. The radius of curvature of aconcave mirror is 80 cm .iffocal length in meter will bea. 0 .40 mb. 0.20 mc. 0.80 md. 0.10 m
248. The radius of curvature ofconvex mirror is 40 cm. then itstotal length isa. 1.20 cmb. 40 cmc. -20 cmd. – 40 cm
249. Mirage is due toa. reflectionb. refractionc. total internal reflectiond. None
250. Total internal reflection canoccur when light passesa. from denser to rarer
mediumb. from rarer to denser
mediumc. from one medium to
another medium of equalrefractive index.
d. None251. The power of a lens is
measured ina. Candelab. Luxc. Diopterd. Weber
Shah Sab MS GIK Institute, 6-06-2006 27252. A person who can read a print
at 80 cm wants to read thesame at 25 cm . The power ofthe lens he should usea. - 2.75 Db. + 2. 75 Dc. 5. 25 Dd. – 5. 25 D
253. A small object is placed 10 cmin front of a plane mirror.If youstand behind the object 30 cmfrom the mirror and look at itsimage , for what distance mustyou focus your eyes?a. 80 cmb. 40 cmc. 20 cmd. 60 cm
254. Which of the following is not afundamental quantity?a. lengthb. temperaturec. electric charged. ampere
255. The system of units followed(now a days) in science isa. cgs systemb. mks systemc. fps system
d .S.I system
256. Which of the following is not aunit of distancea. angstromb. Fermic. Jouled. Parsec
257. How many wavelengths of Kr 86
are there in I meter?a. 1553164.13b. 1650763.73c. 2348123.73d. 652169.13
258. A micron is related tocentimeters asa. 1 micron = 10 -4 cmb. 1 micron = 10 -6 cmc. 1 micron = 10 -8 cmd. 1 micron = 10 -10 cm
259. Dimensions of angular velocityisa. M0L0T-1
b. MLT -1
c. M L T2
d. ML2T
260. The dimensions of light yeararea. Tb. Lc. LT -1
d. T -1
261. The dimensions of which of thequantities of the following pairsare same ?a. light year and wavelengthb. power and workc. energy and powerd. frequency and time
262. One Fermi equalsa. 10 -6 mb. 10-8 mc. 10-15 md. 10-10 m
263. Which of the following is not aunit of time ?a. Lunar Monthb. Leap Yearc. Second Pendulumd. Solar day
264. The expression ML -1 T-1
represents
Shah Sab MS GIK Institute, 6-06-2006 28a. forceb. momentumc. pressured. coefficient of viscosity
265. A force of 6 kg wt and another8 kg wt can be applied toproduce the effect ofa singleforce equal toa. 1 kg wtb. 10 kg wtc. 16 kg wtd. 0 kg wt
266. A particle is moving on acircular path with constantspeed v. What is the change inits velocity after it hasdescribed an angle of 60 ?a. v 2
b. v 3
c. vd. 2v
267. A pendulum is suspended fromthe roof of a car. The car ismoving with an acceleration of49 cm /s -2. By what angle tothe vertical its strings will beinclined?a. 0.b. 3c. 1 0 nearlyd. 30 nearly
268. Two vectors A and B are suchthat A2 + B2 = C2 and A + B = C.Which of the followingstatements is correct?a. A is parallel to Bb. A is anti-parallel to Bc. A is perpendicular to Bd. A and B are equal in
magnitude
269. If the magnitudes of vectors A,B and C are 12 , 5 and 13units respectively and A + B =C , the angle between vectorsand A and B isa. 0b. c. /2d. /4
270. Two persons are holding arope of negligible weight tightlyat its ends so that it ishorizontal .A 15 kg weight isattached to the rope at the midpoint , which is now no longerhorizontal .The minimumtension is required tostraighten completely the ropeisa. 15 kg.b. 7. 5 kgc. 30 kgd. infinite largee. Not enough information is
given271. Two forces each of magnitude
H have a resultant of the samemagnitude F. The anglebetween the two forces isa. 45b. 120c. 150d. 60
272. For the resultant of the twovectors to be maximum whatmust be the angle betweenthem ?a. 0b. 60c. 90d. 180
273. A car X is going to towardswest at a speed of 12 m/s.Another car Y is going
Shah Sab MS GIK Institute, 6-06-2006 29towards northa at a speed of 5m/s. What is the velocity of theCar X with respect to the car Y?a. 7 m/sb. 17 m/sc. 13 m/sd. 7/5 m/s.
274. Which of the following pairs ofdisplacements can not beadded to give a resultantdisplacement of 2 m ?a. 1 m and 2 mb. 1 m and 1 mc. 1 m and 3 md. 1 m and 4 m
275. How many minimum number ofcoplanar vectors havingdifferent magnitudes can beadded to give zero resultant?a. 2b. 3c. 4d. 5
276. The length of a second’s handin a watch is 1 cm .The changein its velocity is 15sec isa. zerob. /30 2 cm/sc. /30 cm/sd. /30 * 2
277. A bird flying towards north witha velocity 40 km/hr and a trainis moving with velocity 40 km/hr towards north. What is thevelocity of the bird noted by aman in the train?a. 40 2 km /hr north-Eastb. 40 2 km/hr south -Eastc. zerod. 40 2 km/hr south East.
278. If A and B are two vectors ,then tick the correct statement:
a. A + B = B+ Ab. A – B = B- Ac. A B = B Ad. None of above
279. If A and B are two vectors ,then tick the wrong statement:a. A + B = B+ Ab. A – B = B- Ac. A B = - B Ad. A. B = B. A
280. If is the angle between thevectors a = I + j and b= j + kthen sin isa. ½b. 1/ 2
c. 3 /2d. 0
281. A particle is simultatneouslyacted upon by two forces equalto 4N and 3N. The net force onthe particle isa. 7 Nb. 5 Nc. 1 Nd. between 1 N and 7 N
282. Identify the vector quantitya. timeb. workc. heatd. angular momentum
283. Identify the scalar quantitya. forceb. accelerationc. displacementd. work
284. The vector sum of N coplanarforces , each of magnitude F ,when each forces is making anangle of 2. /N , what thatpreceding it , isa. Fb. NFc. NF /2d. Zero
Shah Sab MS GIK Institute, 6-06-2006 30285. Any vector in an arbitrary
direction always be replaced bytwo (or three)a. parallel vectors which have
the original vector as theirresultant
b. mutually perpendicularvectors which have theoriginal vector as theirresultant
c. arbitrary vectors whichhave the original vectors astheir resultant.
d. It is not possible to resolvea vector
286. A dimensless vector ofmagnitudea. a single vectorb. isolated vectorc. unit vectord. neutral vector
287. The vector A and B are suchthat A + B = B – A thena. A + B = 0b. A – B = 0c. A = 0d. B = 0
288. A hall has the dimensions 10 m 12 m 14 m. A fly starting atone conrner ends up at adiametrically oppositecorner.What is the magnitudeof its displacement?a. 17 mb. 26 mc. 36 md. 21 m
289. A body is at rest under theaction of three forces . Two ofthe forces are F1 = 3i and F= 5j .The third force isa. 3i + 5 jb. 5 i _ 3jc. – ( 3i + 5j )d. 3 i -5 j
290. The sum of the magnitudes oftwo forces acting at a point is 8N and the magnitude of theirresultant is 4N. If resultantmakes an angle of 90 with thesmaller force , the two forcesarea. 1 Nb. 2N , 6Nc. 3 N , 5 Nd. 4N , 4 N.
291. The scalar and vector productof two vectors are 5 3 and 5respectively. The anglebetween them isa. 30b. 45c. 60d. 90
292. If y = a +bt + ct2 , where y is inmeter , and t is in secondsthen the unit of C isa. mb. s -2
c. m/sd. m/s2
293. A ball of mass 2 kg is movingon a horizontal frictionlesssurface with constant velocity 8m/s , , then the force exertedon the ball isa. 10 Nb. 20 Nc. 40 Nd. None of above.
Shah Sab MS GIK Institute, 6-06-2006 31
294. Which of the followingstatement is false.a. If an object A exerts a force
F on object B, then Bexerts a force of –F on A.
b. The net external forceacting on an object is equalto the rate of change of it’slinear momentum.
c. The increase in potentialenergy of an object isequal to the work done onit by a conservative force.
d. When an object loseskinetic energy, its potentialenergy always increasesby the same amount.
e. Kinetic energy isconserved in an elasticcollision.
295.Complete the followingstatement: The term net forcemost accurately describesa. the mass of an objectb. the inertia of an object.c. the quantity that causes
displacement.d. the quantity that keeps an
object moving.e. the quantity that changes
the velocity of an object.
296. A horse pulls a cart along a flatroad. Consider the followingfour forces that arise in thissituation.a. the force of the horse pulling
on the cartb. the force of the cart pulling
on the horsec. the force of the horse
pushing on the road
d. the force of the roadpushing on the horse
297.. Which two forces form an"action-reaction" pair thatobeys Newton's third law?a. 1 and 4b. 1 and 3c. 2 and 4d. 3 and 4e. 2 and 3
298.Consider the following diagram,which consists of a block beingpulled by a force P.
Which one of the following actionswill increase the frictional force onthe block?
a. increasing the contactsurface area
b. decreasing the contactsurface area
c. increasing the weight ofthe block
d. decreasing the speed ofthe block
Shah Sab MS GIK Institute, 6-06-2006 32e. increasing the angle made
by the rope299. At a playground, a child slides
down a slide that makes a 42°angle with the horizontaldirection. The coefficient ofkinetic friction for the childsliding on the slide is 0.20.What is the magnitude of heracceleration during her sliding?a. 4.6 m/s2b. 5.1 m/s2c. 5.4 m/s2d. 6.3 m/s2e. 9.8 m/s2
300. Sara puts a box into the trunkof her car. Later, she drivesaround an unbanked curve thathas a radius of 48 m. Thespeed of the car on the curve is16 m/s, but the box remainsstationary relative to the floor ofthe trunk. Determine thecoefficient of static friction forthe box on the floor of the trunk.a. 0.42b. 0.54c. 0.17d. 0.33e. This cannot be determined
without knowing the massof the box.
301.A 1500-kg car travels at aconstant speed of 22 m/saround a circular track that hasa radius of 85 m. Whichstatement is true concerningthis car?a. 0.42b. 0.54c. 0.17d. 0.33
e. This cannot be determinedwithout knowing the massof the box.
302. 1500-kg car travels at aconstant speed of 22 m/saround a circular track that hasa radius of 85 m. Whichstatement is true concerningthis car?a. The velocity of the car is
changing.b. The car is characterized
by constant velocity.c. The car is characterized
by constant acceleration.d. The car has a velocity
vector that points alongthe radius of the circle.
e. The car has anacceleration vector that istangent to the circle at alltimes.
303. A spring has a length of 10 cmwith a spring constant k = 500N/m. A force is applied whichcauses the string length tochange to a final length of 20cm. What is the magnitude ofthe work done by the force?a. 1 Jb. 2.5 Jc. 10 Jd. 25 kJe. 100 kJ
304. Which one of the followingchoices is an example of aconservative force?a. tension
Shah Sab MS GIK Institute, 6-06-2006 33b. motor propulsion forcec. normal forced. elastic spring forcee. static frictional force
305. In the figure, if the tension instring 1 is 34 N and the tensionin string 2 is 24 N, what is themass of the object shown?(Note the angle marked is 40)a. 7.3 kgb. 5.5 kgc. 1.8 kgd. 3.7 kge. 4.5 kg
306. A 2.0-kg projectile moves fromits initial position to a point thatis displaced 20 m horizontallyand 15 m above its initialposition. How much work isdone by the gravitational forceon the projectile?a. +0.29 kJb. –0.29 kJc. +30 Jd. –30 Je. –50 J
307. Two satellites are placed ingeosynchronous orbits, orbitswith a period of 24 hours,where each satellite hoversover a spot on the Earth’sequator. Satellite B has threetimes the mass of satellite A.What is the relationshipbetween the magnitudes of thegravitational forces of the Earthon the two satellites?
a. FB = 91FA.
b. FB = 31FA.
c. FB = FA.d. FB = 3FA.e. FB = 9FA.
308. 20 J of work is done inaccelerating a 4 kg mass fromrest across a horizontalfrictionless table. The totalkinetic energy gained by themass isa. 4 Jb. 5 Jc. 10 jd. 20 Je. 80 J
Shah Sab MS GIK Institute, 6-06-2006 34309. A motor rated at 50 W
accelerates an object along ahorizontal frictionless surfacewith an average speed of 2m/s. What force is supplied bythe motor in the direction ofmotion? (assume 100 %efficiency)a. 200 Nb. 100 Nc. 50 Nd. 25 Ne. 0.04 N
310. A crane raises a 100 N weightto a height of 50 m in 5seconds. The crane does workat the rate ofa. 8 * 10 -1 Wb. 2 * 10 1 Wc. 1 * 10 3 Wd. 5 * 10 4 We. 100 W
311. As the power of a machine isincreased , the time required tomove a body by a fixeddistancea. decreasesb. increasesc. remains the samed. decreases to zeroe. is negligible
312. When a body moves at aconstant speed against frictionon a horizontal tabletop , thereis an increase in the object’sa. A temperatureb. kinetic energyc. potential energyd. acceleratione. weight
313. A ball is thrown upwards fromthe earth surface. While theball is rising , its gravitationalpotential energy will
a. decreaseb. increasec. remain the samed. decrease to zeroe. be negligible
314. As a body slides across ahorizontal surface, thegravitational potential energyof the object willa. decreaseb. increasec. remain the samed. increase from zero valuee. decrease to zero value
315. A 4 kg mass falls freely for 5 mnear the surface of the Earth .The total kinetic energy gainedby the object during its free fallis approximatelya. 400 Jb. 200 Jc. 100 Jd. 50 Je. 20 J
316. When the speed of an object ishalved, its kinetic energy isa. quarteredb. halvedc. the samed. doublede. quadrupled
317. A 4 N book falls from a table0.5m high. After falling 0.25 m ,the book’s kinetic energya. 1.0 Jb. 10 Jc. 2 Jd. 9.8 J
Shah Sab MS GIK Institute, 6-06-2006 35e. 20 J
318. A force of 40 N pushes a 25 kgobject across a level floor for4m. The work done in J isa. 10b. 100c. 160d. 4000 Je. 1000 J
319. A 10 N block falls freely fromrest a point 3.0 m above thesurface of the Earth .Withrespect to the surface of theEarth, what is the gravitationalpotential energy of the block-Earth system, \m after the blockhas fallen 1.5 m.a. 10 Jb. 15 Jc. 30 Jd. 30 Je. 60 J
320. Which mass has the greatestgravitational potential energywith respect to the floor?a. 50-kg mass resting on the
floorb. 3-kg mass 10 m above the
floorc. 10 kg mass 2m above the
floord. 6 kg mass 5m above the
floore. 1000 kg mass resting on
the floor.
321. A body is lifted at constantspeed a distance H above thesurface of the Earth in a time t .
the total potential energygained by the body is equal toa. average force applied to
the objectb. total weight of the objectc. total work done on the
objectd. total momentum gained by
the objecte. total work done per unit
time
322. If the radius becomes half of itsinitial value and velocityincreases by a factor of 3factor then the magnitude ofcentripetal accelerationa. increases by a factor 6b. decreases by a factor 9c. increases by a factor 18d. increases by a factor 24
323. A motor cyclist in death wellrevolving with speed of 5 m/suniformly in circular motion , hedoest fall down to earthbecausea. his weight is balanced by
weight of the motor-cycleb. his weight and motorcycle
weight both are zeroc. his weight and motor-cycle
weight both balanced byfrictional force betweentires and surface of thewell
d. none324. Earth revolves around the Sun
with uniform angular speed thenet force acting on the Earth isa. zerob. frictional forcec. Normal forced. None
Shah Sab MS GIK Institute, 6-06-2006 36325. An electron revolves around the
Nucleus , its circular motiondue toa. gravitational force of
Nucleusb. gravitational force of
electronc. coulomb attractive forced. coulomb force and
gravitational both326. In vertical circular motion of a
stone attached to a string , thetension in the string at themiddle isa. equals to weight of the
stoneb. centripetal forcec. centripetal and weightd. zero
327. In Hooks law the restoring forceis equal toa. F = kxb. F = -kxc. F = mad. F = mg
328. Rotational inertia depends uponthe mass anda. distance of mass from
certain reference pointb. square of the distance of
mass from certainreference point
c. does not depend ondistance
d. only depends on angularvelocity
329. The angular momentum of anisolated system remainsconstant if the net torque isequal toa. applied forceb. angular speed
c. angular momentumd. zero
330. Direction of torque isa. parallel to the axis along
which force actsb. perpendicular to axis of
rotationc. does not depend on
direction because torque isscalar
d. none331. Rainbow appears in the sky
due toa. reflection of lightb. refraction of lightc. dispersion of lightd. all of above
332. The ratio of velocity of light inthe medium to the velocity oflight in the vacuum is equal toa. nb. 1/nc. n2
d. 2ne. frequency
333. The index of refraction n isa. always greater than oneb. always less than onec. may be greater than or
less than oned. index of refraction is only
integer number334. The index of refraction is
a. inversely proportional tospeed of wave
b. directly proportional tospeed of wave
c. equal to speed of lightd. none
335. The greater the index ofrefraction in a material thea. greater the wave speedb. slower the wave speedc. doest have any relation
Shah Sab MS GIK Institute, 6-06-2006 37d. first increase then
decrease336. when a wave passes from one
material into a second materialwith larger index of refractionthen the wave speeda. increasesb. constantc. decreasesd. not enough information
given we should know thefrequency also
337. the wavelength of a wave in amedium is given by 474 nmwith index of refraction of 1.34then the wavelength of thesame wave in vacuum will bea. 633 nmb. 474 nmc. we can not calculate from
the given informationd. 474 A
338. Polarization is a characteristicof alla. wavesb. transverse wavesc. longitudinal wavesd. both longitudinal and
transverse339. If the earth had no atmosphere
the sky will look like in day timea. Redb. Bluec. Blackd. white
340. The sky is blue in day time andsun-set is red , these processdue to thea. scattering of lightb. refraction of lightc. diffraction of lightd. all of above
341. plane mirror produces an imagethat is thea. double size of the object
b. same size of the objectc. depends upon the positiond. none
342. Which of the following is nottrue about plane mirrors aplane mirror cana. not give us larger imageb. give us an image of the
same sizec. give us real imaged. all of the above
343. When the object point P is veryfar from the spherical mirrorsi.e. p =α the incoming rays area. parallelb. mixture of parallel and
normalc. non-convergingd. none
344. Any lens that is thicker at itscenter than its at its edges isa
345. converging lensa. will have positive Fb. will have negative fc. both a and bd. all a , b and c
346. Any lens that is thicker at itsedges than at its center isdiverging lens thena. f is positiveb. f is negativec. some positive and
negatived. depends upon the position
of object347. A projector for viewing slides ,
digital images or motionpictures operates very muchlike aa. camerab. camera in a reversec. eyed. plane mirror
Shah Sab MS GIK Institute, 6-06-2006 38348. Cameras , eyeglasses and
magnifiers usea. a single lensb. two lensesc. three lensesd. depends upon the person
who use it349. Microscope and Telescope
a. need two lensesnecessarily
b. need one lens onlyc. it may be one , two or threed. Telescope does not need
any lens350. When two or more waves
overlap, the resultantdisplacement at any point isfound bya. adding the instantaneous
displacementsb. multiplying the
instantaneous amplitudesc. dividing the displacementsd. none
351. Interference effects of light areseen whena. waves are monochromaticb. coherentc. the two slits are closed
nearbyd. all of above
352. Two sources of waves are saidto be coherent when the twosources area. of same frequencyb. same amplitudec. have a constant phased. all of above
353. In a two –slit interferenceexperiment, the slits are 0.20mm apart, and the screen is ata distance of 1.0 m. The third
fringe is found to be displaced7.5 mm from the central fringe.Find the wavelength of the lightuseda. 300 nmb. 500 Ac. 500 nmd. 50 cm
354. You shine a tunable laser on apair of closely spaced slits.The light emerging from thetwo slits producing aninterference pattern on ascreen. If you adjust thewavelength so that the laserlight changes from red to blue,how will the spacing betweenbright fringes change?a. remains sameb. increasec. decreased. first increase then
decrease355. Suppose two glass plates are
two microscope slides 10. 0cm long. At one end they are incontact; at the other end theyare separated by a piece ofpaper 0.0200 mm thick. Whatis the spacing of theinterference fringes seen byrefection? Assumemonochromatic light ofwavelength in air = 500 nma. m(1.25 nm)b. m(1.25 cmc. m(1.25 nm)d. zero
356. An important experimentaldevice that uses interferenceto calculate very small distancevery precise isa. Newton’ Ringsb. Young’s Slit diffraction
Shah Sab MS GIK Institute, 6-06-2006 39c. Telescoped. none
357. A Michelson interferometer isused with light of wavelength605.78 nm.If the observerviews the interference patternthrough a telescope with acrosshair eye-piece, how manyfringes pass the crosshairswhen mirror M2 moves exactlyone centimeter?a. 1500b. 3000c. 1600d. 33,015
358. How far must the Mirror M2 ofthe Michelson interferometer bemoved so that 1800 fringes ofHe-Ne laser light of wavelength= 633 nm move across a line inthe field of view?a. aaab. aaac. aaad. aaa
359. When a light from a pointsource falls on a straight edgeand casts a shadow , then theshadow never perfectly sharp ,the reason for this effect isa. diffractionb. interferencec. polarizationd. all of above
360. The phenomena in whichinterference phenomena oflaser produces a threedimensional image is calleda. reflectionb. double-reflectionc. holographyd. none
361. Which of the following is nottrue about diffraction
a. sound waves can notproduce diffraction aroundan edge
b. sound waves can producediffraction around edges
c. light waves can notproduce diffraction aroundedges of buildings
d. Light waves can producediffraction around edges ofthickness smaller than thewavelength of light.
362. In diffraction grating equationdsinθ = m λ , if m = +2 thediffraction obtained is calleda. first orderb. zero orderc. third orderd. none
363. If the number of slits per mm is600 then the grating space orelement is equal toa. 1.67 nmb. 1670 nmc. 1670 Ad. 1.67 mm
364. The Braggs condition fordiffraction of X-rays through acrystal isa. dsinθ = 2m λb. dsinθ = m λc. dsinθ = m λ/2d. dsin2θ = m λ
365. After an airplane takes off, ittravels 6 km West, 3km north,and 2 km up, how far is it fromthe takeoff point?a. 12 kmb. 7kmc. 13 kmd. 11 km
366. How far are you from yourstarting point if you firsttraveled 4.0 km due west, then4.00 km due south?
Shah Sab MS GIK Institute, 6-06-2006 40a. 5.66 kmb. zeroc. 16 kmd. none
367. In acceleration-time graph , if astraight line is parallel to x-axisthena. motion is a constant
velocityb. motion is increasing
accelerationc. motion is constant speedd. motions is acceleration
decreasinge. none
368. If you toss a ball upward with acertain velocity, it falls freelyand reaches a maximum heighth .What maximum height doesthe ball reaches if you throw itupward with double the initialvelocity?a. hb. 2hc. 3hd. none
369. If the acceleration a isincreasing with time , will the v-time graph be aa. straight lineb. concave upc. concave downd. none
370. Projectile Motion is acombination ofa. motion with constant
horizontal velocity andconstant vertical velocity
b. motion with constanthorizontal velocity andconstant verticalacceleration
c. motion with variablehorizontal velocity andconstant vertical motion
d. None371. You toss a ball from your
window 8.0m above theground .When the ball leavesyou hand , it is moving at 10m/s at angle of 30 below thehorizontal , how far horizontallyfrom your window will the ballhit the ground?(ignore airresistance)a. 9.2 mb. 9.8 mc. 4md. none
372. When a particle moves in acircle with constant speed themotion is calleda. angular motionb. circular motionc. spiral motiond. uniform circular motion
373. In a Non-uniform circularmotion there is a also acomponent of acceleration thatisa. parallel to instantaneous
velocityb. perpendicular to
instantaneous velocityc. along the radiusd. No component parallel to
instantaneous velocity374. The compass of an airplane
indicates that is headed duenorth, and its airspeedindicator shows that is movingthrough the air at 240 km/h .Ifthere is a wind of 100 km/hfrom west to east , what is thevelocity of the airplane relativeto the Earth?
Shah Sab MS GIK Institute, 6-06-2006 41a. 260 km/hr , 23 East or
Northb. 260 km/hr , North of Eastc. 260 km /hr , West of Northd. 260 km/hr , East of West
375. A gymnast with mass mG = 50kg suspends herself from thelower end of a hanging rope.The upper end of the rope isattached to the gymnasiumceiling. What is the tension atthe top of the ropea. zerob. 490 Nc. T+Wd. None
376. An elevator and its load have atotal mass of 800 kg .Theelevator is originally movingdownward at 10 m/s , it slowsto a stop with constantacceleration in a distance of25m.Find the tension T in thesupporting cable with theelevator is being to rest?a. 1540 Nb. 9440 Nc. 2 Nd. zero
377. A 50 kg man stand on abathroom scale while riding inthe elevator moving withacceleration 2 m/s2 . What isthe reading on the scale?a. 590 Nb. 500 Nc. 490 Nd. zero
378. The BMW Z4 roadster (A brandname of a Car) is rounding aflat, unbanked curve with radiusR .If the coefficient of frictionbetween tires and road is μswhat is the maximum speed
vmax at which the driver cantake the curve without sliding?a. mgRb. μs gRc. √ μs gRd. mR/a
379. Coulomb Force andGravitational force area. short range forcesb. long range forcesc. only gravitational force is
long ranged. range of both forces
depend upon the distance380. Nuclear Strong force and
Nuclear Weak force area. short rangeb. long rangec. only weak force is short
ranged. only strong force is short
range381. Mark with order of decreasing
of strength of four forcesa. Gravitational, nuclear
weak, strong, coulomb.b. strong, electromagnetic,
weak, gravitationalc. strong, electromagnetic,
gravitational, weakd. d. all forces are equal
382. The gravitational potentialenergy varies asa. 1/rb. r2
c. 1/r 2
d. 1/r 3
383. The SHM of a simplependulum vibrates only whenthere isa. applied forceb. periodic forcec. restoring forced. gravitational force
Shah Sab MS GIK Institute, 6-06-2006 42384. The maximum magnitude of
displacement of a simplependulum is calleda. amplitudeb. frequencyc. one cycled. period
385. The maximum speed of a massattached to a spring occurs at x= 0 and given bya. w Ab. √(k/m Ac. 1/2 k Ad. zero
386. The Elastic Potential ismaximum when x= A and givenbya. w A
b. 1/2 k x2
c. 1/2 k A2
d. 1/2 k A387. If the equilibrium position of a
mass attached to a spring is2m. then force acting on themass of 6 kg stretched through10m is given bya. 2kb. 10kc. 12kd. 8ke. (K is a spring constant.)
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