set 2 MCQ Questions & Answers Detailed Explanation

Question : 1

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 : 2

Flow velocities in an incompressible fluid can be measured with which one of the following?

a) Strain gauge

b) Venturi tube

c) Barometer

d) Manometer

Question : 3

Two objects of different masses falling freely near the surface of moon would

a) experience forces of same magnitude

b) have different accelerations

c) have same velocities at any instant

d) undergo a change in their inertia

Question : 4

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 : 5

An artificial satellite orbiting the earth does not fall down because the earth’s attraction

a) is balanced by the viscous drag produced by the atmosphere

b) vanishes at such distances

c) is balanced by the attraction of the moon

d) produces the necessary acceleration of its motion in a curved path

Question : 6

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.