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

The work performed on an object does not depend on:

Question # 2

A 2 kg block is held 1 m above floor for 50 seconds. The work done is:

Question # 3

Work is a

Question # 4

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

Question # 5

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

Question # 6

The ultimate source of money sources of energy is:

Question # 7

Work is a Quantity

Question # 8

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 # 9

Which of the following is not a unit of power:

Question # 10

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

Question # 11

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

Question # 12

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 # 13

The commercial unit of electrical energy is :

Question # 14

The power of an electric generating station is expressed in:

Question # 15

A two Kg block is held 1 m above the floor for 50 seconds, the work done is:

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 The work done in moving a body between two points in a conservative field is independent of the
A. Direction
B. Force applied
C. Path followed by the body
D. Power
2 Work done is independent of path followed in _______
A. Gravitational field
B. Magnetic field
C. Electric field
D. All of these
3 Which of the following is not a unit of power:
A. J-sec
B. Watt
C. N m/sec
D. Horsepower
4 When force and displacement are perpendicular to each other than work is equal to
A. Unity
B. Infinity
C. Zero
D. -Fd
5 Which of the following type of force can do no work on the particle on which it acts:
A. Frictional force
B. Gravitational force
C. Electric force
D. Centripetal force
6 The field in which work done is moving body between two points depends upon the path followed is called:
A. Conservative filed
B. Non-conservative field
C. Electric field
D. None of these
7 The work performed on an object does not depend on
A. Force applied
B. Angle at which force is inclined to the displacement
C. Initial velocity of the object
D. Displacement
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 The tidal energy is due to gravitational pull of :
A. sun
B. moon
C. Mars
D. None of these
10 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°

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