AIPMT 2011 Solved Papers
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Physics 2011
Q. 11. The potential energy of a system increases if work is done
(1) Upon the system by a conservative force
(2) Upon the system by a non-conservative force
(3) By the system against a conservative force
(4) By the system against a non-conservative force
Sol.
By definition
Answer : (3)
Q. 12. A body is moving with velocity 30 m/s towards east. After 10 seconds its velocity becomes 40 m/s towards north. The average acceleration of the body is
(1) 5 m/s2 (2) 1 m/s2
(3) 7 m/s2 (4) 7 m/s2
Sol.
Answer : (1)
Q. 13. A missile is fired for maximum range with an initial velocity of 20 m/s. If g = 10 m/s2 , the range of the missile is
(1) 20 m (2) 40 m
(3) 50 m (4) 60 m
Sol.
Answer : (2)
Q. 14. Force F on a particle moving in a straight line varies with distance d as shown in the figure. The work done on the particle during its displacement of 12 m is
(1) 13 J (2) 18 J
(3) 21 J (4) 26 J
Sol.
Work = Area under (F – d) graph
= 8 + 5 = 13 J
Answer : (1)
Q. 15. A charge Q is enclosed by a Gaussian spherical surface of radius R. If the radius is doubled, then the outward electric flux will
(1) Be doubled (2) Increase four times
(3) Be reduced to half (4) Remain the same
Sol.
Answer : (4)