ECAT Pre Computer Science Chapter 4 MCQ Test With Answer

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

Try The 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

Work is a scalar product of

Question # 2

Work done in lower and bucket into the well is:

Question # 3

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 # 4

Work has the dimension as that of:

Question # 5

Work done is lowering the bucket into the well is:

Question # 6

Area under the force displacement graph gives

Question # 7

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

Question # 8

Which force is not a conservative force:

Question # 9

Work done on a body by gravity in lifting it up to certain height is

Question # 10

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

Question # 11

Tick the conservative force

Question # 12

The work performed on an object does not depend on:

Question # 13

Work is a:

Question # 14

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

Question # 15

Power is a :

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 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°
2 Which force is not a conservative force?
A. Frictional force
B. Gravitational force
C. Electric force
D. Elastic spring force
3 If work is done at the rate of 2 k j per second, then total work done is half an hour will be:
A. 0.5 Kwn
B. 2 Kwh
C. 1 Kwh
D. None of these
4 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
5 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
6 Which one is conservative force
A. Electric force
B. Frictional force
C. Normal force
D. Air resistance
7 If force and displacement are in opposite direction, the work done is taken as:
A. Positive work
B. Negative work
C. Zero work
D. Infinte work
8 The angle between centripetal force and displacement of the body moving in a circle is:
A. 0°
B. 90°
C. 180°
D. None of these
9 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:
A. 1.25 J
B. 12.5 J
C. 125 J
D. None of these
10 The work done by a force, keeping an object in circular motion with constant speed is:
A. Zero J
B. 1 J
C. 0.1 J
D. 0.01 J

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