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 done is lowering the bucket into the well is:

Question # 2

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

Question # 3

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

Question # 4

Work is a:

Question # 5

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 # 6

Which force is not a conservative force?

Question # 7

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

Question # 8

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

Question # 9

A solar cell is made from:

Question # 10

Work is a scalar product of

Question # 11

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 # 12

Work is always done on a body when:

Question # 13

The commercial unit of electrical energy is :

Question # 14

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

Question # 15

Which of the following is not a unit of power:

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 If force and displacement are in opposite direction, the work done is taken as:
A. Positive work
B. Negative work
C. Zero work
D. Infinite work
2 Work has the dimensions as that of
A. Torque
B. Angular momentum
C. Linear momentum
D. Power
3 When force and displacement are perpendicular to each other than work is equal to
A. Unity
B. Infinity
C. Zero
D. -Fd
4 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. 0.5 J
B. 2 J
C. 0.25 J
D. 1 J
5 The ultimate source of money sources of energy is:
A. Sun
B. Air
C. Water
D. Petroleum
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 Energy stored in the spring of a watch is called
A. Potential energy
B. Kinetic energy
C. Nuclear energy
D. Elastic potential
8 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°
9 Work is a
A. Scalar quantity
B. Vector quantity
C. Base quantity
D. None of these
10 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°

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