set 2 MCQ Questions & Answers Detailed Explanation

Question : 1

A block of ice is floating in a beaker containing liquid of specific gravity greater than one. When ice melts completely what happens to the level of liquid in the beaker?

a) It will rise up

b) It will go down

c) It will remain the same as before

d) It may or may not change depending upon size of beaker

Question : 2

Which one among the following is the correct value of the gravitational force of the Earth acting on a body of mass 1 kg?

a) 89 N

b) 9. 8 N

c) 8. 9 N

d) 98 N

Question : 3

A spring balance is graduated on sea level. A body of mass 1 kg is weighed at consecutively increasing heights from the earth’s surface, then what would be the weight indicated by the balance?

a) Weight will remain same

b) Weight will go on decreasing continuously

c) Weight will go on increasing continuously

d) Weight will first increase and then decreases

Question : 4

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 : 5

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)