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 has the dimension as that of:

Question # 2

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

Question # 3

When a wall is pushed by a person very strongly, he has done:

Question # 4

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 # 5

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

Question # 6

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 # 7

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

Question # 8

If work is done at the rate of 2 k j per second, then total work done is half an hour will be:

Question # 9

The space around the earth within it exerts a force of attraction on other bodies of known as:

Question # 10

The commercial unit of electrical energy is :

Question # 11

The unit of work in CGS system is

Question # 12

Work is a scalar product of

Question # 13

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

Question # 14

Work done by the force of friction is always

Question # 15

The consumption of energy by a 60 W bulb in 2 minutes is:

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 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°
2 Which of the following is not a unit of power:
A. J-sec
B. Watt
C. N m/sec
D. Horsepower
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 A two Kg block is held 1 m above the floor for 50 seconds, the work done is:
A. Zero
B. 10.2 J
C. 100 J
D. 980 J
5 Which of the following types 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
6 Work done is lowering the bucket into the well is:
A. Zero
B. Positive
C. Negative
D. None of these
7 Work is product of:
A. Force and velocity
B. Heat and energy
C. Force and displacement
D. None of these
8 The types of mechanical energy is/are:
A. Kinetic energy
B. Potential energy
C. Both of these
D. None of these
9 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
10 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

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