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 laborer carrying a load on his head moves from the rest on a horizontal road to another point where he comes to rest. He has done:

Question # 2

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

Question # 3

The consumption of energy by a 60 W bulb in 2 minutes is:

Question # 4

The space around the earth in which its gravitational force acts on a body is called

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

Tick the conservation force:

Question # 7

Work is a Quantity

Question # 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 is 25J. the angle which the force makes with the direction of motion will be:

Question # 9

Work done is independent of path followed in _______

Question # 10

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

Question # 11

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

Question # 12

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 # 13

The work performed on an object does not depend on

Question # 14

Work done along a closed path in a gravitational field is:

Question # 15

Which of the following types of force can do no work on the particle on which it acts

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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 When a force of 0.5 N displaces a body through a distance of 2m in the direction of force, the work done is:
A. 2 J
B. 0.25 J
C. 1 J
D. 0.5 J
3 Which of the following is not a unit of power:
A. J-sec
B. Watt
C. N m/sec
D. Horsepower
4 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
5 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
6 The energy stored int he water of the dam is:
A. Electric energy
B. Kinetic energy
C. Potential energy
D. None of these
7 Work done is lowering the bucket into the well is:
A. Zero
B. Positive
C. Negative
D. None of these
8 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
9 Work done by the force of friction is always
A. Positive
B. Zero
C. Negative
D. Maximum
10 The tidal energy is produced due to rotation of Earth relative to:
A. Moon
B. Sun
C. Oceans
D. Water

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