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

1 J = ________?

Question # 2

The space around the earth in which its gravitational force acts on a body is called

Question # 3

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 # 4

Work done in lower and bucket into the well is:

Question # 5

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:

Question # 6

The dimensions of work

Question # 7

Work has the dimension as that of:

Question # 8

Work is a:

Question # 9

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

Question # 10

A solar cell converts energy of the Sun into:

Question # 11

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

Question # 12

Work is always done on a body when:

Question # 13

Work has the dimensions as that of

Question # 14

The work done moving a body between two points in a conservation field is independent of the:

Question # 15

The tidal energy is due to gravitational pull of :

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 Which of the following is not a unit of power:
A. J-sec
B. Watt
C. N m/sec
D. Horsepower
2 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
3 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
4 The space around the earth in which its gravitational force acts on a body is called
A. Electric Field
B. Gravitational field
C. Magnetic field
D. Conservative field
5 The total work done in moving the body up and then down through the same height in a gravitational field is equal to:
A. mgh
B. Its wight
C. Weight X height
D. Zero
6 A 2 kg block is held 1 m above floor for 50 seconds. The work done is:
A. Zero
B. 10.2 J
C. 100 J
D. 980 J
7 Work has a dimension as that of:
A. Torque
B. Angular momentum
C. Linear momentum
D. Power
8 Work has the dimensions as that of
A. Torque
B. Angular momentum
C. Linear momentum
D. Power
9 When a wall is pushed by a person very strongly, he has done:
A. Maximum work
B. Zero work
C. Positive work
D. Negative work
10 1 J = ________?
A. 107erges
B. 10-7erges
C. 105erges
D. 10-5erges

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