ECAT Pre General Science Physics Chapter 4 MCQ Test With Answer

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

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ECAT Pre General Science Physics Chapter 4 Work and Energy

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Question # 1

When a force of 0.5 N displaces a body through a distance of 2m in the direction of force, the work done is:

Question # 2

The unit of work in CGS system is

Question # 3

The tidal energy is produced due to rotation of Earth relative to:

Question # 4

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

Question # 5

Tick the conservative force

Question # 6

The work done by a force keeping an object in circular motion with constant speed is:

Question # 7

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

Question # 8

Work is a scalar product of

Question # 9

Work done is maximum when angle between force and displacement is

Question # 10

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

Question # 11

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

Question # 12

When velocity of moving body is doubled, the quantity which is also doubled is its:

Question # 13

The dimensions of work

Question # 14

A 2 kg block is held 1 m above floor for 50 seconds. The work done is:

Question # 15

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:

Question # 16

In the force applied is parallel to the direction of motion, then work done is:

Question # 17

When force and displacement are perpendicular to each other than work is equal to

Question # 18

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

Question # 19

If one newton force acts on a body and displaces the body through 1m work done on body is

Question # 20

1 J = ________?

Question # 21

SI Unit of work is

Question # 22

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

Question # 23

The work done by a force, keeping an object in circular motion with constant speed is:

Question # 24

A solar cell converts energy of the Sun into:

Question # 25

Which one is conservative force

Question # 26

Work is a Quantity

Question # 27

Energy stored in the spring of a watch is called

Question # 28

The total work done in moving the body up and then down through the same height in a gravitational field is equal to:

Question # 29

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

Question # 30

When a force of 0.5 N displaces a body through a distance of 2m in the direction of force, the work done is

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 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
2 Work is a Quantity
A. Vector
B. Scalar
C. Non-physical
D. None of these
3 Work-energy principle states that work done on the body by applied force is equal to change in:
A. Potential energy
B. Kinetic nergy
C. Linear momentum
D. None of these
4 The work done in moving a body between two points in a conservation field is independent of the:
A. Direction
B. Force applied
C. Path followed by the body
D. Power
5 The field in which work done in moving a body between two points depends upon the path followed is called:
A. Conservative field
B. Non-conservative field
C. Electric field
D. None of these
6 Work is a:
A. Scalar quantity
B. Vector quantity
C. Base quantity
D. None of these
7 A body moves a distance of 10 m along a straight line under the action of a force of 5 N and work done is 25J. The angle which the force makes the direction of motion will be:
A. 60°
B. 90°
C. 30°
D. 0°
8 When a falling body hits ground, its KE changes to _____ energy.
A. Potential
B. Chemical
C. Mechanical
D. sound and heat
9 Work has a dimension as that of:
A. Torque
B. Angular momentum
C. Linear momentum
D. Power
10 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:`
A. Minimum work
B.
Maximum work
C. Zero work
D. Negative work

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