set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

The substance which exhibits practically no elastic effect is

a) Fe

b) quartz

c) rubber

d) Cu

Question : 2

A geostationary satellite

a) must move on an axis in the equatorial plane

b) must move about the polar axis

c) can move about any axis

d) both (b) and (c)

Question : 3

In respect of the difference of the gravitational force from electric and magnetic forces, which one of the following statements is true ?

a) Gravitational force has a very short range.

b) Gravitational force is attractive only, whereas the electric and the magnetic forces are attractive as well as repulsive.

c) Gravitational force is stronger than the other two.

d) Gravitational force is a long range force, while the other two are short range forces.

Question : 4

Assertion (A) :
The weight of a body decreases with the increase of altitude on earth.
Reason (R) :
The earth is not a perfect sphere.

a) A is true but R is false

b) Both A and R are true but R is not a correct explanation of A

c) Both A and R are true and R is the correct explanation of A

d) A is false but R is true

Question : 5

If a gas is heated at constant pressure its isothermal compressibility

a) decreases with temperature

b) remains constant

c) increases with temperature

d) decreases inversely with temperature

Question : 6

The weight of a body is 9.8 N at the place where g = 9.8 ms–2. Its mass is

a) 10 kg

b) 9.8 kg

c) zero

d) 1 kg