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 in lower and bucket into the well is:

Question # 2

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:`

Question # 3

The commercial unit of electrical energy is :

Question # 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:

Question # 5

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

Question # 6

Work done by the force of friction is always

Question # 7

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

Question # 8

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

Question # 9

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

Question # 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:

Question # 11

The tidal energy is due to gravitational pull of :

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

The dimensions of work

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 A field in which the work done in moving a body along closed path is zero is called
A. Nuclear Field
B. Conservative field
C. Gravitational field
D. Non-conservative field
2 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
3 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
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. 2 J
B. 0.25 J
C. 1 J
D. 0.5 J
5 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
6 The energy stored int he water of the dam is:
A. Electric energy
B. Kinetic energy
C. Potential energy
D. None of these
7 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
8 The power of an electric generating station is expressed in:
A. Kilo Jule
B. Kilowatt-hour
C. Kilo watt
D. Watt
9 Maximum work is done when force and displacement are
A. Parallel
B. Antiparallel
C. Perpendicular
D. Both a and b
10 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:
A. Power
B. Work
C. Pressure
D. None of these

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