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

Work is a

Question # 2

The power of an electric generating station is expressed in:

Question # 3

Area under the force displacement graph gives

Question # 4

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

Question # 5

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 # 6

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

Question # 7

Tick the conservation force:

Question # 8

Work done is maximum when angle between force and displacement is

Question # 9

The tidal energy is produced due to rotation of Earth relative to:

Question # 10

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

Question # 11

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

Question # 12

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 # 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

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

Question # 15

The total work done in moving the body up and then down through the same height in a gravitational field is equal to:

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 The energy stored int he water of the dam is:
A. Electric energy
B. Kinetic energy
C. Potential energy
D. None of these
2 The amount of coal used since 1945 up till now as compared to that used in the whole of history before that is
A. Much more
B. Very small
C. No amount at all
D. None of these
3 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:
A. +5 x 101J
B. +5 x 102J
C. +5 x 103J
D. +5 x 104J
4 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
5 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
6 A solar cell converts energy of the Sun into:
A. Heat energy
B. Magnetic energy
C. Light energy
D. Sound energy
7 Work done on a body by gravity in lifting it up to certain height is
A. Maximum
B. Minimum
C. Zero
D. Negative
8 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
9 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
10 The power of an electric generating station is expressed in:
A. Kilo Jule
B. Kilowatt-hour
C. Kilo watt
D. Watt

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