ECAT Pre General Science Physics Chapter 4 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 4 Work and Energy

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ECAT Pre General Science Physics Chapter 4 Work and Energy

00:00
Question # 1

A solar cell converts energy of the Sun into:

Question # 2

Work is a scalar product of

Question # 3

The amount of coal used since 1945 up till now as compared to that used in the whole of history before that is

Question # 4

A 100 kg car is moving at a speed of 10 m/sec and comes to rest after covering a distance of 50 m. the amount of work done against friction is:

Question # 5

The power of an electric generating station is expressed in:

Question # 6

Most of the geysers occur in:

Question # 7

When the body is moves against the force of friction on a horizontal plane, the work done by the body 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 and angle of 60° with the horizontal. The work done by the boy is:

Question # 9

Work is a

Question # 10

The unit of work in CGS system is

Question # 11

Which of the following is not a unit of power:

Question # 12

Work is always done on a body when:

Question # 13

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

Question # 14

The value of escape velocity of Earth planet comes out to be:

Question # 15

Work is a:

Question # 16

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 # 17

The work performed on an object does not depend on:

Question # 18

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

Question # 19

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

Question # 20

The tidal energy is due to gravitational pull of :

Question # 21

The energy stored int he water of the dam is:

Question # 22

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 # 23

Work has the dimension as that of:

Question # 24

1 J = ________?

Question # 25

A 2 kg block is held 1 m above floor for 50 seconds. The work done is:

Question # 26

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:

Question # 27

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

Question # 28

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 # 29

Which force is not a conservative force?

Question # 30

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

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 When a falling body hits ground, its KE changes to _____ energy.
A. Potential
B. Chemical
C. Mechanical
D. sound and heat
2 The power of an electric generating station is expressed in:
A. Kilo Jule
B. Kilowatt-hour
C. Kilo watt
D. Watt
3 Work done by the force of friction is always
A. Positive
B. Zero
C. Negative
D. Maximum
4 Teh consumption of energy by a 1000 watt heater in half an hour is:
A. 5 Kwh
B. 0.5 Kwh
C. 2.5 Kwh
D. 3.2 Kwh
5 The ultimate source of money sources of energy is:
A. Sun
B. Air
C. Water
D. Petroleum
6 Which of the following type of force can do no work on the particle on which it acts:
A. Frictional force
B. Gravitational force
C. Electric force
D. Centripetal force
7 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°
8 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
9 A body moves a distance of 10 m along a straight line under the action of a force of 5 N. If the work done is 25 J, the angle which force makes with the direction of motion of a body is:
A. 0°
B. 30°
C. 60°
D. 90°
10 Work is product of:
A. Force and velocity
B. Heat and energy
C. Force and displacement
D. None of these

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