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

Work is always done on a body when:

Question # 2

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 # 3

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

Question # 4

Work is a Quantity

Question # 5

A solar cell converts energy of the Sun into:

Question # 6

Work has a dimension as that of:

Question # 7

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

Question # 8

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

Question # 9

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

Question # 10

Work is a always done on a body when

Question # 11

Work done is independent of path followed in _______

Question # 12

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

Question # 13

When a wall is pushed by a person very strongly, he has done:

Question # 14

Which force is not a conservative force?

Question # 15

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

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 Maximum work is done when force and displacement are
A. Parallel
B. Antiparallel
C. Perpendicular
D. Both a and b
2 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
3 The power of an electric generating station is expressed in:
A. Kilo Jule
B. Kilowatt-hour
C. Kilo watt
D. Watt
4 Work done on a body by gravity in lifting it up to certain height is
A. Maximum
B. Minimum
C. Zero
D. Negative
5 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
6 When force and displacement are perpendicular to each other than work is equal to
A. Unity
B. Infinity
C. Zero
D. -Fd
7 Work done by the force of friction is always
A. Positive
B. Zero
C. Negative
D. Maximum
8 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
9 A 100 Kg car is moving at the speed of 10 m/sec and comes to rest after covering a distance of 50 m. The amount of work done against the friction is:
A. +5 X 101J
B. +5 X 102J
C. +5 X 103J
D. +5 X 104J
10 The types of mechanical energy is/are:
A. Kinetic energy
B. Potential energy
C. Both of these
D. None of these

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