set 5 MCQ Questions & Answers Detailed Explanation

Question : 1

A car is moving on a road and rain is falling vertically. Select the correct answer.

a) The rain will strike both the screens

b) The rain will strike the front screen only

c) The rain will strike the wind screen only

d) The rain will not strike any of the screens

Question : 2

The working principle of a washing machine is :

a) reverse osmosis

b) dialysis

c) centrifugation

d) diffusion

Question : 3

It is difficult to walk on the ice than on the road because

a) Ice does not offer any reaction when we push it with our foot

b) Road is harder than the ice

c) Ice is harder than the road

d) Ice has a lesser friction than the road

Question : 4

The potential energy of a freely falling object decreases progressively.

a) Sum of Potential Energy and Kinetic Energy at any point during the free fall remains constant

b) Potential energy gets converted into kinetic energy progressively

c) The law of conservation of energy is violated

d) Both (a) and (b)

Question : 5

A book is kept on the surface of a table. If the gravitational pull of the earth on the book is the force of action, then the force of reaction is exerted by

a) the table on the book

b) the book on the earth

c) the book on the table

d) the table on the earth

Question : 6

In wind power, which form of energy is converted into electrical energy?

a) Solar energy

b) Potential energy

c) Kinetic energy

d) Radiant energy