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

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

Question # 2

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

Question # 3

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 # 4

The tidal energy is produced due to rotation of Earth relative to:

Question # 5

The work performed on an object does not depend on:

Question # 6

Work is a

Question # 7

Work is a Quantity

Question # 8

The unit of work in CGS system is

Question # 9

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

Question # 10

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

Question # 11

Escape velocity from surface of Moon as compared to that from Earth surface is:

Question # 12

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

Question # 13

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

Question # 14

When a falling body hits ground, its KE changes to _____ energy.

Question # 15

Work done is maximum when angle between force and displacement is

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 If force and displacement are in opposite direction, the work done is taken as:
A. Positive work
B. Negative work
C. Zero work
D. Infinte work
2 A body moves a distance of 10 m along a straight line under the action of a force of 5 N. If the work done is 25 J, the angle which force makes with the direction of motion of a body is:
A. 0°
B. 30°
C. 60°
D. 90°
3 SI Unit of work is
A. Nm-1
B. Joule
C. Nms
D. Both a and b
4 Which force is not a conservative force:
A. Frictional force
B. Gravitational force
C. Electric force
D. Elastic spring force
5 The consumption of energy by a 60 W bulb in 2 minutes is:
A. 2 watt-hour
B. 120 watt-hour
C. 30 watt-hour
D. None of these
6 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:
A. +5 x 101J
B. +5 x 102J
C. +5 x 103J
D. +5 x 104J
7 If one newton force acts on a body and displaces the body through 1m work done on body is
A. 1 dyne
B. 1 joule
C. 1KJ
D. 1 Watt
8 Watt x second is unit of:
A. Force
B. Work
C. Power
D. None of these
9 Work done along a closed path in a gravitational field is:
A. Maximum
B. Minimum
C. Zero
D. Unity
10 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:
A. Power
B. Work
C. Pressure
D. None of these

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