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

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

Question # 2

The space around the earth within which it expects a force of attraction on other bodies is known as:

Question # 3

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

Question # 4

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 # 5

When velocity of moving body is doubled, the quantity which is also doubled is its:

Question # 6

The work performed on an object does not depend on:

Question # 7

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

Question # 8

Area under the force displacement graph gives

Question # 9

Tick the conservative force

Question # 10

Work is always done on a body when:

Question # 11

The commercial unit of electrical energy is :

Question # 12

The power of an electric generating station is expressed in:

Question # 13

Power is a :

Question # 14

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

Question # 15

1 J = ________?

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 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
2 When a falling body hits ground, its KE changes to _____ energy.
A. Potential
B. Chemical
C. Mechanical
D. sound and heat
3 A 100 Kg car is moving at the speed of 10 m/sec and comes to rest after covering a distance of 50 m. The amount of work done against the friction is:
A. +5 X 101J
B. +5 X 102J
C. +5 X 103J
D. +5 X 104J
4 The Space around the Earth within which it exerts a force of attraction on other bodies is known as
A. Nuclear field
B. Conservative field
C. Electric field
D. Gravitational field
5 Work is product of:
A. Force and velocity
B. Heat and energy
C. Force and displacement
D. None of these
6 Work is always done on a body when:
A. A force acts on it
B. It moves through certain distance
C. None of A and B is correct
D. Both A and B is correct
7 A field in which the work done is moving a body along closed path is zero is called:
A. Nuclear filed
B. Conservative field
C. Gravitational field
D. Non-conservative field
8 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
9 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
10 The commercial unit of electrical energy is :
A. K Watt
B. KWH
C. Horse power
D. Joule

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