Physics Page-17

161) A bomb is dropped at a point from a moving airplane. The pilot observes that
(A) The bomb traverses a curved path and falls some distance behind that point
(B) The bomb traverses a curved path and falls some distance ahead
(C) The bomb drops vertically downward
(D) The bomb remains stationary in the air for some time

162) When light passes from air into the glass it experiences the change in
(A) Frequency and wavelength
(B) Frequency and speed
(C) Wavelength and speed
(D) Frequency, wavelength and speed

163) A person sitting in an open car moving at constant velocity throws a ball vertically upwards in the air, If effect of air resistance is neglected, the ball will fall
(A) Exactly in hands of the person
(B) Outside the cars
(C) In the car behind the person
(D) In the car ahead of the person

164) The difference between a nuclear reactor and an atomic bomb is that
(A) No chain reaction takes place in nuclear reactor while in the atomic bomb there is a chain reaction
(B) No chain reaction takes place in atomic bomb while it takes place nuclear reactor
(C) The chain reaction in nuclear reactor is controlled
(D) The chain reaction in nuclear reactor is not controlled

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