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

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

Question # 3

The work performed on an object does not depend on:

Question # 4

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

Question # 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:

Question # 6

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

Question # 7

Work is a:

Question # 8

Power is a :

Question # 9

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

Question # 10

The space around the earth within it exerts a force of attraction on other bodies of known as:

Question # 11

A solar cell converts energy of the Sun into:

Question # 12

Work done by the force of friction is always

Question # 13

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

Question # 14

The tidal energy is due to gravitational pull of :

Question # 15

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

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 When a falling body hits ground, its KE changes to _____ energy.
A. Potential
B. Chemical
C. Mechanical
D. sound and heat
4 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°
5 The power of an electric generating station is expressed in:
A. Kilo Jule
B. Kilowatt-hour
C. Kilo watt
D. Watt
6 Work done is independent of path followed in _______
A. Gravitational field
B. Magnetic field
C. Electric field
D. All of these
7 Maximum work is done when force and displacement are
A. Parallel
B. Antiparallel
C. Perpendicular
D. Both a and b
8 A body moves a distance of 10 m along a straight line under the action of a force of 5 N and work done in 25J. The angle which the force makes with the direction of motion will be
A. 60°
B. 90°
C. 30°
D. 0°
9 The ultimate source of money sources of energy is:
A. Sun
B. Air
C. Water
D. Petroleum
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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