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

A body moves a distance of 10 m among a straight line under the action of a force of 5 N. If the work done is 25 J, the angle which the force makes with the direction of motion of a body is:

Question # 2

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

Question # 3

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:

Question # 4

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

Question # 5

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

Question # 6

The value of escape velocity of Earth planet comes out to be:

Question # 7

Tick the conservation force:

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

The angle between centripetal force and displacement of the body moving in a circle is:

Question # 10

Which force is not a conservative force?

Question # 11

Tick the conservative force

Question # 12

Which one is conservative force

Question # 13

If we draw a graph between d (along x-axis) and F (along y-axis) and get a straight line horizontal to x-axis, then area under this straight line represents:

Question # 14

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

Question # 15

SI Unit of work is

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 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
2 A solar cell converts energy of the Sun into:
A. Heat energy
B. Magnetic energy
C. Light energy
D. Sound energy
3 The power of an electric generating station is expressed in:
A. Kilo Jule
B. Kilowatt-hour
C. Kilo watt
D. Watt
4 Which force is not a conservative force?
A. Frictional force
B. Gravitational force
C. Electric force
D. Elastic spring force
5 The commercial unit of electrical energy is :
A. K Watt
B. KWH
C. Horse power
D. Joule
6 Work done is independent of path followed in _______
A. Gravitational field
B. Magnetic field
C. Electric field
D. All of these
7 The space around the earth within which it expects a force of attraction on other bodies is known as:
A. Nuclear field
B. Conservative field
C. Electric field
D. Gravitational field
8 Watt x second is unit of:
A. Force
B. Work
C. Power
D. None of these
9 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
10 Teh consumption of energy by a 1000 watt heater in half an hour is:
A. 5 Kwh
B. 0.5 Kwh
C. 2.5 Kwh
D. 3.2 Kwh

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