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

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

Question # 4

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

Question # 5

The work done on the body will be zero if:

Question # 6

Work done in lower and bucket into the well is:

Question # 7

The energy stored int he water of the dam is:

Question # 8

Tick the conservative force

Question # 9

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

Question # 10

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

Question # 11

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:

Question # 12

The power of an electric generating station is expressed in:

Question # 13

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

Question # 14

Energy stored in the spring of a watch is called

Question # 15

The unit of work in CGS system is

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 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
A. 60°
B. 90°
C. 30°
D. 0°
2 A boy pulls a toy car through a distance of 5 m by applying a force of 0.5 N, Which makes an angle of 60° with the horizontal. The work done by the boy is:
A. 1.25 J
B. 12.5 J
C. 125 J
D. None of these
3 SI Unit of work is
A. Nm-1
B. Joule
C. Nms
D. Both a and b
4 Work is always done on a body when:
A. A force acts on it
B. It moves through certain distance
C. None of A and B is correct
D. Both A and B is correct
5 A solar cell converts energy of the Sun into:
A. Heat energy
B. Magnetic energy
C. Light energy
D. Sound energy
6 The ultimate source of money sources of energy is:
A. Sun
B. Air
C. Water
D. Petroleum
7 The dimensions of work
A. [MLT-1]
B. [MLT-2]
C. [ML2T-2]
D. [MLT]
8 The types of mechanical energy is/are:
A. Kinetic energy
B. Potential energy
C. Both of these
D. None of these
9 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
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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