set 2 MCQ Questions & Answers Detailed Explanation

Question : 1

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 : 2

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 : 3

Assertion (A) :
With the increase of temperature, the viscosity of glycerine increases.
Reason (R) :
Rise of temperature increases kinetic energy of molecules.

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 : 4

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 : 5

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 : 6

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