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AARYAN ACADEMY PRE -BOARD FINAL EXAMINATION 2010 Name:______________________ Class: 1 st Year Date:_________ Subject: Physics Ch# 1,2,3,4 Marks: 17 Time: 20min OBJECTIVE 1) The dimension of the gravitational constant is a. M -1 L 3 T -2 b. ML 2 T -2 c. M 2 L -1 T -2 d. ML -2 T -1 2) Significant figures in 0.000846 are a. Six b. Four c. Three d. Seven 3) The unit vector of a vector A of magnitude 2 is a. 2A b. A 2 c. A/2 d. A 2 /2 4) Which of the following is a scalar quantity? a. Energy b. Momentum c. Impulse d. Weight 5) The Fx components of a force vector ‘F’ of magnitude 30N making an angle of 60 0 with the x-axis a. 7N b. 15N c. 10N d. 0N 6) The angle of a vector A = Axi – Ayj with the x-axis will be in between a. 0 0 to 90 0 b. 90 0 to 180 0 c. 180 0 to 270 0 d. 270 0 to 360 0 7) One light year is equal to a. 9.46 × 10 5 cm b. 9.46 ×10 15 m c. 9.46×10 15 km d.9.46×10- 15 cm 8) Area under velocity Time graph gives a. Displacement b. Work c. Power d. Acceleration 9) A force of 15N acts on a body of mass 5kg for 5sec to a distance of 10cm the rate of change of momentum is a. 75N b. 45N c. 15N d. 0N 10) The acceleration of a body at the highest point a. Zero b. Increase c. Decrease d. Constant 11) A body is dropped from a high rise building. Distance covered by the block in one second a. 9.8m b. 4.9m c. 19.6m d. 2.5m 12) In the absence of an external force change in momentum of a system is a. Constant b. increase c. Decrease d. Zero
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AARYAN ACADEMY PRE -BOARD FINAL EXAMINATION 2010Name:______________________ Class: 1st Year Date:_________
Subject: Physics Ch# 1,2,3,4 Marks: 17 Time: 20min
OBJECTIVE1) The dimension of the gravitational constant isa. M-1L3T-2 b. ML2T-2 c. M2L-1T-2 d. ML-2T-1
2) Significant figures in 0.000846 area. Six b. Four c. Three d. Seven3) The unit vector of a vector A of magnitude 2 isa. 2A b. A2 c. A/2 d. A2/24) Which of the following is a scalar quantity?a. Energy b. Momentum c. Impulse d. Weight5) The Fx components of a force vector ‘F’ of magnitude 30N making an angle of
600 with the x-axisa. 7N b. 15N c. 10N d. 0N6) The angle of a vector A = Axi – Ayj with the x-axis will be in betweena. 00 to 900 b. 900 to 1800
c. 1800 to 2700 d. 2700 to 3600
7) One light year is equal toa. 9.46 × 105cm b. 9.46 ×1015mc. 9.46×1015km d.9.46×10-15cm8) Area under velocity Time graph givesa. Displacement b. Work c. Power d. Acceleration 9) A force of 15N acts on a body of mass 5kg for 5sec to a distance of 10cm the rate
of change of momentum isa. 75N b. 45N c. 15N d. 0N10) The acceleration of a body at the highest point a. Zero b. Increase c. Decrease d. Constant11) A body is dropped from a high rise building. Distance covered by the block in one
second a. 9.8m b. 4.9m c. 19.6m d. 2.5m12) In the absence of an external force change in momentum of a system isa. Constant b. increase c. Decrease d. Zero13) When the mass and speed of the moving body is doubled then its K.E becomesa. Double b. Eight times c. Four times d. sixteen
times14) If the direction o the force is perpendicular to the direction of the motion of the
body then work done will bea. Minimum b. Maximum c. Zero d. Infinity15) A body of mass 3kg lies on the surface of 2m high. it is moved on the surface by
4m. the change in the P.E will bea. Zero b. 9.8J c. 60J d. 120J 16) A body is said to be in complete equilibrium ifa. Σ F = 0 b. ΣFx = 0, ΣFy = 0, ΣF=0c. ΣF=0 , Στ = 0 d. Στ = 017) A precise measurement is one which hasa. Maximum precise b. Absolute precise c. Less precise d. None of
these
