Physics Past Questions and Answers

The mercury column in a simple mercury barometer is of height 5m above the mercury in a reservoir. If the tube is replaced with one whose radius is twice that of the first tube, what will be the height of the mercury column in the new tube?

A 2.5m
B 5.0m
C 7.5m
D 10.0m
E 20.0m

Question 272:

The escape velocity of an object from the gravitational field of a planet

I. Increases with the mass of the object
II. Increases with the mass of the planet
III. Is smaller on the moon than on the earth. Which of the above statements is/are correct?

A I only
B II only
C I and II only
D II and III only
E I, II and III

Question 273:

Which of the following is a non-renewable energy source?

A Coal
B Hydro
C Ocean waves
D Solar
E Tides

Question 274:

Which of the following is NOT a component of an a.c. generator?

A Armature
B Carbon brushes
C Magnet
D Slip ring
E Split rings

Question 275:

An object of mass 5.0 cg moving with a velocity of 12ms^-1 due north hits a stationary body of mass 7.0kg. If they stick together after collision and move with velocity V due north, calculate the magnitude of V.

A 12ms^-1
B 7ms^-1
C 6ms^-1
D 5ms^-1
E 4ms^-1