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

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 # 2

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 # 3

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

Question # 4

Which one is conservative force

Question # 5

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 # 6

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

Question # 7

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

Question # 8

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

Question # 9

Work is a

Question # 10

The power of an electric generating station is expressed in:

Question # 11

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

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

Work done is maximum when angle between force and displacement is

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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 Which one is conservative force
A. Electric force
B. Frictional force
C. Normal force
D. Air resistance
3 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°
4 Tick the conservative force
A. Tension in a string
B. Air resistance
C. Elastic spring
D. Frictional force
5 Power is a :
A. Vector quantity
B. Base quantity
C. Scalar quantity
D. None of these
6 In the force applied is parallel to the direction of motion, then work done is:
A. Maximum
B. Minimum
C. Zero
D. None of these
7 Work has the dimensions as that of
A. Torque
B. Angular momentum
C. Linear momentum
D. Power
8 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
9 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
10 The ultimate source of money sources of energy is:
A. Sun
B. Air
C. Water
D. Petroleum

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