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 force is not a conservative force?

Question # 2

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

Question # 3

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

Question # 4

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

Question # 5

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

Question # 6

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

Question # 7

Work has a dimension as that of:

Question # 8

If work is done at the rate of 2 k j per second, then total work done is half an hour will be:

Question # 9

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

Question # 10

Work is product of:

Question # 11

Which of the following is not a unit of power:

Question # 12

The amount of coal used since 1945 up till now as compared to that used in the whole of history before that is

Question # 13

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

Question # 14

When a falling body hits ground, its KE changes to _____ energy.

Question # 15

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:

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 Power is a :
A. Vector quantity
B. Base quantity
C. Scalar quantity
D. None of these
2 Work is 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 is correct
3 Tick the conservative force
A. Tension in a string
B. Air resistance
C. Elastic spring
D. Frictional force
4 Work done in lower and bucket into the well is:
A. Zero
B. Positive
C. Negative
D. None of these
5 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
6 Work has the dimensions as that of
A. Torque
B. Angular momentum
C. Linear momentum
D. Power
7 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
8 A field in which the work done is moving a body along closed path is zero is called:
A. Nuclear filed
B. Conservative field
C. Gravitational field
D. Non-conservative field
9 A body moves a distance of 10 m along a straight line under the action of a force of 5 N. If the work done is 25 J, the angle which force makes with the direction of motion of a body is:
A. 0°
B. 30°
C. 60°
D. 90°
10 The unit of work in CGS system is
A. Joule
B. Erg
C. Dyne
D. Watt

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