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 Space around the Earth within which it exerts a force of attraction on other bodies is known as

Question # 2

Which one is conservative force

Question # 3

Area under the force displacement graph gives

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

Question # 6

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

Question # 7

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

Question # 8

Which of the following is not a unit of power:

Question # 9

Work-energy principle states that work done on the body by applied force is equal to change in:

Question # 10

Work done is maximum when angle between force and displacement is:

Question # 11

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

Question # 12

Teh consumption of energy by a 1000 watt heater in half an hour is:

Question # 13

Work is a always done on a body when

Question # 14

A labourer carrying a distance a load on his head moves from rest on a horizontal road to another point where he comes to rest. He has done:`

Question # 15

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

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 The angle between centripetal force and displacement of the body moving in a circle is:
A. 0°
B. 90°
C. 180°
D. None of these
2 A solar cell converts energy of the Sun into:
A. Heat energy
B. Magnetic energy
C. Light energy
D. Sound energy
3 SI Unit of work is
A. Nm-1
B. Joule
C. Nms
D. Both a and b
4 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
5 Work has the dimension as that of:
A. Torque
B. Angular momentum
C. Linear momentum
D. Power
6 1 J = ________?
A. 107erges
B. 10-7erges
C. 105erges
D. 10-5erges
7 Tick the conservative force
A. Tension in a string
B. Air resistance
C. Elastic spring
D. Frictional force
8 When force and displacement are perpendicular to each other than work is equal to
A. Unity
B. Infinity
C. Zero
D. -Fd
9 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
10 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

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