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 along a straight line under the action of a force of 5 N and work done in 25J. The angle which the force makes with the direction of motion will be

Question # 2

Work done by the force of friction is always

Question # 3

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

Question # 4

Work done is maximum when angle between force and displacement is

Question # 5

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 # 6

The commercial unit of electrical energy is :

Question # 7

Work done in lower and bucket into the well is:

Question # 8

A boy pulls a toy car through a distance of 5 m by applying a force of 0.5 N, Which makes an angle of 60° with the horizontal. The work done by the boy is:

Question # 9

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

Question # 10

A field in which the work done in moving a body along closed path is zero is called

Question # 11

Work is a scalar product of

Question # 12

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

Question # 13

When a force of 0.5 N displaces a body through a distance of 2m in the direction of force, the work done is

Question # 14

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

Question # 15

The dimensions of work

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 The work done on the body will be zero if:
A. No force is applied on the body
B. Force is applied but no displacement
C. Angle between F(force) and d(displacement) is 90°
D. All of these are correct
2 The tidal energy is due to gravitational pull of :
A. sun
B. moon
C. Mars
D. None of these
3 The work done by a force keeping an object in circular motion with constant speed is:
A. Zero J.
B. 0.1 J
C. 1 J
D. 0.01 J
4 Work done is maximum when angle between force and displacement is:
A. 0°
B. 90°
C. 180°
D. None of these
5 The work done in moving a body between two points in a conservation field is independent of the:
A. Direction
B. Force applied
C. Path followed by the body
D. Power
6 Power is a :
A. Vector quantity
B. Base quantity
C. Scalar quantity
D. None of these
7 If force and displacement are in opposite direction, the work done is taken as:
A. Positive work
B. Negative work
C. Zero work
D. Infinite work
8 Work-energy principle states that work done on the body by applied force is equal to change in:
A. Potential energy
B. Kinetic nergy
C. Linear momentum
D. None of these
9 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:
A. 0°
B. 30°
C. 60°
D. 90°
10 If work is done at the rate of 2 k j per second, then total work done is half an hour will be:
A. 0.5 Kwn
B. 2 Kwh
C. 1 Kwh
D. None of these

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