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

Area under the force displacement graph gives

Question # 2

Tick the conservative force

Question # 3

Work has the dimensions as that of

Question # 4

Work is always done on a body when:

Question # 5

Tick the conservation force:

Question # 6

Work has the dimension as that of:

Question # 7

Work done is independent of path followed in _______

Question # 8

Work done is maximum when angle between force and displacement is

Question # 9

The total work done in moving the body up and then down through the same height in a gravitational field is equal to:

Question # 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:

Question # 11

The unit of work in CGS system is

Question # 12

A solar cell is made from:

Question # 13

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

Question # 14

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 # 15

Which force is not a conservative force:

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 The dimensions of work
A. [MLT-1]
B. [MLT-2]
C. [ML2T-2]
D. [MLT]
2 When two protons are brought are brought closer potential energy of both of them:
A. Increases
B. Decreases
C. Remains same
D. None of these
3 SI Unit of work is
A. Nm-1
B. Joule
C. Nms
D. Both a and b
4 Maximum work is done when force and displacement are
A. Parallel
B. Antiparallel
C. Perpendicular
D. Both a and b
5 Which of the following type 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 When velocity of moving body is doubled, the quantity which is also doubled is its:
A. K.E.
B. Acceleration
C. Momentum
D. P.E.
7 The work done in moving a body between two points in a conservative field is independent of the
A. Direction
B. Force applied
C. Path followed by the body
D. Power
8 Which force is not a conservative force?
A. Frictional force
B. Gravitational force
C. Electric force
D. Elastic spring force
9 The tidal energy is produced due to rotation of Earth relative to:
A. Moon
B. Sun
C. Oceans
D. Water
10 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

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