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 power of an electric generating station is expressed in:

Question # 2

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

Question # 3

SI Unit of work is

Question # 4

Tick the conservation force:

Question # 5

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

Question # 6

Work is a scalar product of

Question # 7

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 # 8

Which of the following is not a unit of power:

Question # 9

The work done on the body will be zero if:

Question # 10

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

Question # 11

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:

Question # 12

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

Question # 13

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 # 14

The work performed on an object does not depend on:

Question # 15

When a body moves against the force of friction on a horizontal plane, the work done by the body is:

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 The value of escape velocity of Earth planet comes out to be:
A. 11 m/sec
B. 11 km/sec
C. 11 km/hour
D. 11 cm/sec
2 Watt x second is unit of:
A. Force
B. Work
C. Power
D. None of these
3 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. 0.5 J
B. 2 J
C. 0.25 J
D. 1 J
4 In the force applied to parallel to the direction of motion, then the work done is:
A. Positive
B. Negative
C. Zero
D. None of these
5 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
6 The space around the earth within which it expects a force of attraction on other bodies is known as:
A. Nuclear field
B. Conservative field
C. Electric field
D. Gravitational field
7 Work is a 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 are correct
8 Work done on a body by gravity in lifting it up to certain height is
A. Maximum
B. Minimum
C. Zero
D. Negative
9 Power is a :
A. Vector quantity
B. Base quantity
C. Scalar quantity
D. None of these
10 The work done 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

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