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

Which of the following is not a unit of power:

Question # 2

Work is a scalar product of

Question # 3

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

Question # 4

When the body is moves against the force of friction on a horizontal plane, the work done by the body is:

Question # 5

The Space around the Earth within which it exerts a force of attraction on other bodies is known as

Question # 6

Area under the force displacement graph gives

Question # 7

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:

Question # 8

Work is a:

Question # 9

Work is always done on a body when:

Question # 10

The work performed on an object does not depend on:

Question # 11

Work-energy principle states that work done on the body by applied force is equal to change in:

Question # 12

Work has the dimensions as that of

Question # 13

Teh consumption of energy by a 1000 watt heater in half an hour is:

Question # 14

A labourer carrying a distance a load on his head moves from rest on a horizontal road to another point where he comes to rest. He has done:`

Question # 15

A field in which the work done is moving a body along closed path is zero is called:

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 Work done by the force of friction is always
A. Positive
B. Zero
C. Negative
D. Maximum
2 Work is a always done on a body when
A. A force acts on it
B. It moves through certain distance
C. None of A or B is correct
D. Both A and B are correct
3 When two protons are brought are brought closer potential energy of both of them:
A. Increases
B. Decreases
C. Remains same
D. None of these
4 The total work done in moving the body up and then down through the same height in a gravitational field is equal to:
A. mgh
B. Its wight
C. Weight X height
D. Zero
5 When the body is moves against the force of friction on a horizontal plane, the work done by the body is:
A. Positive
B. Negative
C. Zero
D. None of these
6 Work is a scalar product of
A. Force, Velocity
B. Velocity, Displacement
C. Force, Displacement
D. Force, Momentum
7 A 100 kg car is moving at a speed of 10 m/sec and comes to rest after covering a distance of 50 m. the amount of work done against friction is:
A. +5 x 101J
B. +5 x 102J
C. +5 x 103J
D. +5 x 104J
8 If we draw a graph between d (along x-axis) and F (along y-axis) and get a straight line horizontal to x-axis, then area under this straight line represents:
A. Power
B. Work
C. Pressure
D. None of these
9 If one newton force acts on a body and displaces the body through 1m work done on body is
A. 1 dyne
B. 1 joule
C. 1KJ
D. 1 Watt
10 The work performed on an object does not depend on
A. Force applied
B. Angle at which force is inclined to the displacement
C. Initial velocity of the object
D. Displacement

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