[MCQ] Physics Objective Questions With Answer For WBCS Exam, Set 02

WBCS PHYSICS MCQ Q.1

A body is charged negatively. It implies that

(A) It has lost some of its protons

(B) It has acquired some electrons from outside

(C) It has lost some of its electrons

(D) None of the above

Ans.(B)

WBCS PHYSICS MCQ Q.2

The product of the moment of inertia and the angular acceleration is

(A) force

(B) torque

(C) work

(D) angular momentum

Ans.(B)

WBCS PHYSICS MCQ Q.3

Why do you feel cool under a tree but not so under a tin shed on a sunny day?

(A) The greenness of the tree gives a cool feeling

(B) Photosynthesis absorbs heat

(C) The leaves convert water vapours into water which is a heat absorbing process

(D) The leaves give out water which vapourizes absorbing some heat as latent heat

Ans.(D)

WBCS PHYSICS MCQ Q.4

Which one among the following would expand the most on being heated?

(A) water

(B) alcohol

(C) glass

(D) air

Ans.(D)

WBCS PHYSICS MCQ Q.5

Why an iron nail floats on mercury but sinks in water?

(A) less chemical affinity of iron than mercury with water

(B) the weight of iron nail is more than water but less than mercury

(C) the density of iron is more than water but less than mercury

(D) none of these

Ans.(C)

WBCS PHYSICS MCQ Q.6

The sudden downfall of the reading of barometer indicates that the weather

(A) will be stable and calm

(B) will be rainy

(C) will be stormy

(D) will be cyclonic

Ans.(C)

WBCS PHYSICS MCQ Q.7

In which of the following kinetic energy does not exist

(A) fired bullet

(B) flowing water

(C) imparted hammer

(D) stretched bow

Ans.(D)

WBCS PHYSICS MCQ Q.8

The cyclist (man) leans or bends himself around a turning because

(A) speed of man and cycle should be the same, otherwise the cycle will skid

(B) he bends to locate the centre of gravity inside the base which prevents him from falling down

(C) he bends to exert pressure on the cycle's wheels to move on the curved track (path)

(D) he bends to cross the curved path speedily

Ans.(B)

WBCS PHYSICS MCQ Q.9

Which of the following force is exerted by a cream separator machine of the milk

(A) centrifugal force

(B) centripetal force

(C) non-central force

(D) external force

Ans.(A)

WBCS PHYSICS MCQ Q.10

When a stone piece is brought from the moon's surface to the earth then

(A) its mass will change

(B) its weight will change but its mass would remain constant

(C) the weight and mass both will change

(D) neither mass nor weight will change

Ans.(B)