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

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Question # 1

The field in which work done is moving body between two points depends upon the path followed is called:

Question # 2

When a wall is pushed by a person very strongly, he has done:

Question # 3

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

Question # 4

The field in which work done in moving a body between two points depends upon the path followed is called:

Question # 5

The power of an electric generating station is expressed in:

Question # 6

The consumption of energy by a 60 W bulb in 2 minutes is:

Question # 7

The work done by a force keeping an object in circular motion with constant speed is:

Question # 8

Work done in lower and bucket into the well is:

Question # 9

A solar cell is made from:

Question # 10

Work is always done on a body when:

Question # 11

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

Question # 12

Area under the force displacement graph gives

Question # 13

If work is done at the rate of 2 k j per second, then total work done is half an hour will be:

Question # 14

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

Question # 15

Work done along a closed path in a gravitational field is:

Question # 16

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

Question # 17

Maximum work is done when force and displacement are

Question # 18

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

Question # 19

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

Question # 20

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:

Question # 21

Work is a:

Question # 22

Work is a always done on a body when

Question # 23

Work has the dimensions as that of

Question # 24

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

Question # 25

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 # 26

A laborer carrying a load on his head moves from the rest on a horizontal road to another point where he comes to rest. He has done:

Question # 27

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

Question # 28

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

Question # 29

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

Question # 30

Work done by the force of friction is always

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Sr. # Question Answer
1 Tick the conservative force

A. Tension in a string

B. Air resistance

C.Elastic spring

D. Frictional force

2 Which force is not a conservative force:

A. Frictional force

B. Gravitational force

C.Electric force

D. Elastic spring force

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

A. Increases

B. Decreases

C.Remains same

D. None of these

4 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

5 SI Unit of work is

A. Nm-1

B. Joule

C.Nms

D. Both a and b

6 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

7 The ultimate source of money sources of energy is:

A. Sun

B. Air

C.Water

D. Petroleum

8 Work is a

A. Scalar quantity

B. Vector quantity

C.Base quantity

D. None of these

9 Escape velocity from surface of Moon as compared to that from Earth surface is:

A. Greater

B. Smaller

C.Equal

D. None of thes

10 The work done in moving a body between two points in a conservative field is independent of the

A. Direction

B. Force applied

C.Path followed by the body

D. Power

11 A solar cell is made from:

A. Iron

B. Silicon

C.Germanium

D. Copper

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

A. Positive

B. Negative

C.Zero

D. None of these

13 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

14 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 the direction of motion will be:

A. 60°

B. 90°

C.30°

D. 0°

15 The work performed on an object does not depend on

A. Force applied

B. Angle at which force is inclined to the displacement

C.Initial velocity of the object

D. Displacement

16 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:`

A. Minimum work

B.

Maximum work

C.Zero work

D. Negative work

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

A. Unity

B. Infinity

C.Zero

D. -Fd

18 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

19 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

20 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°

21 Work has the dimensions as that of

A. Torque

B. Angular momentum

C.Linear momentum

D. Power

22 The consumption of energy by a 60 W bulb in 2 minutes is:

A. 2 watt-hour

B. 120 watt-hour

C.30 watt-hour

D. None of these

23 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

24 Work is a Quantity

A. Vector

B. Scalar

C.Non-physical

D. None of these

25 The tidal energy is due to gravitational pull of :

A. sun

B. moon

C.Mars

D. None of these

26 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

27 Work has the dimension as that of:

A. Torque

B. Angular momentum

C.Linear momentum

D. Power

28 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

29 The work done by a force, keeping an object in circular motion with constant speed is:

A. Zero J

B. 1 J

C.0.1 J

D. 0.01 J

30 Which of the following types 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

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