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

The tidal energy is due to gravitational pull of :

Question # 2

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

Question # 3

Work has the dimension as that of:

Question # 4

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

Question # 5

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

Question # 6

Work done is maximum when angle between force and displacement is

Question # 7

The energy stored int he water of the dam is:

Question # 8

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 # 9

Which of the following type of force can do no work on the particle on which it acts:

Question # 10

The commercial unit of electrical energy is :

Question # 11

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

Question # 12

Work is a:

Question # 13

A field in which the work done is moving a body along closed path is zero is called:

Question # 14

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

Question # 15

Work is a:

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 Work has a dimension as that of:
A. Torque
B. Angular momentum
C. Linear momentum
D. Power
2 Work is product of:
A. Force and velocity
B. Heat and energy
C. Force and displacement
D. None of these
3 The unit of work in CGS system is
A. Joule
B. Erg
C. Dyne
D. Watt
4 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
5 Which force is not a conservative force:
A. Frictional force
B. Gravitational force
C. Electric force
D. Elastic spring force
6 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
7 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
8 The power of an electric generating station is expressed in:
A. Kilo Jule
B. Kilowatt-hour
C. Kilo watt
D. Watt
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 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:
A. 1.25 J
B. 12.5 J
C. 125 J
D. None of these

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