Question

12
Assertion (A) : When a body completes its 'round trip', the net work done against
gravitational force is zero.
w
Reason (R) : Gravitational force is conservative in nature.
13. Assertion (A): The flow of a liquid, through a pipe, is most likely to be stream lined
when the diameter of the pipe, as well as the velocity of flow of the liquid, have very
large values
Reason (R) : During stream lined flow, the velocity of the different liquid particles,
crossing a particular point, must keep on increasing continuously.
14.
Assertion (A) : An aircraft, passing near a building can, at times, cause vigorous
vibrations of its window panes.
Reason (R) : When resonance occurs the amplitude of vibrations becomes large.​

Answer 1

Answer:

12

Assertion (A) : When a body completes its 'round trip', the net work done against

gravitational force is zero.

w

Reason (R) : Gravitational force is conservative in nature.

13. Assertion (A): The flow of a liquid, through a pipe, is most likely to be stream lined

when the diameter of the pipe, as well as the velocity of flow of the liquid, have very

large values

Reason (R) : During stream lined flow, the velocity of the different liquid particles,

crossing a particular point, must keep on increasing continuously.

14.

Assertion (A) : An aircraft, passing near a building can, at times, cause vigorous

vibrations of its window panes.

Reason (R) : When resonance occurs the amplitude of vibrations becomes large