ECAT Pre Computer Science Chapter 4 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 4 Work and Energy

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ECAT Physics Chapter 4 Work and Energy

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Question # 1

The commercial unit of electrical energy is :

Question # 2

Work is a:

Question # 3

If force and displacement are in opposite direction, the work done is taken as

Question # 4

Work done is maximum when angle between force and displacement is:

Question # 5

Work is always done on a body when:

Question # 6

Tick the conservative force

Question # 7

The power of an electric generating station is expressed in:

Question # 8

Which of the following type of force can do no work on the particle on which it acts:

Question # 9

1 J = ________?

Question # 10

Work has the dimensions as that of

Question # 11

The work done in moving a body between two points in a conservation field is independent of the:

Question # 12

The field in which work done is moving body between two points depends upon the path followed is called:

Question # 13

When two protons are brought are brought closer potential energy of both of them:

Question # 14

Which force is not a conservative force?

Question # 15

A boy pulls a toy car through a distance of 5 m by applying a force of 0.5 N, which makes and angle of 60° with the horizontal. The work done by the boy is:

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 The space around the earth within which it expects a force of attraction on other bodies is known as:
A. Nuclear field
B. Conservative field
C. Electric field
D. Gravitational field
2 Work done is maximum when angle between force and displacement is:
A. 0°
B. 90°
C. 180°
D. None of these
3 The commercial unit of electrical energy is :
A. K Watt
B. KWH
C. Horse power
D. Joule
4 Which force is not a conservative force?
A. Frictional force
B. Gravitational force
C. Electric force
D. Elastic spring force
5 Work is always done on a body when:
A. A force acts on it
B. It moves through certain distance
C. None of A and B is correct
D. Both A and B is correct
6 Maximum work is done when force and displacement are
A. Parallel
B. Antiparallel
C. Perpendicular
D. Both a and b
7 When a falling body hits ground, its KE changes to _____ energy.
A. Potential
B. Chemical
C. Mechanical
D. sound and heat
8 Work is product of:
A. Force and velocity
B. Heat and energy
C. Force and displacement
D. None of these
9 Which of the following types of force can do no work on the particle on which it acts
A. Frictional force
B. Gravitational force
C. Electric force
D. Centripetal force
10 Work is a scalar product of
A. Force, Velocity
B. Velocity, Displacement
C. Force, Displacement
D. Force, Momentum

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