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 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

Question # 2

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

Question # 3

A laborer carrying a load on his head moves from the rest on a horizontal road to another point where he comes to rest. He has done:

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

A two Kg block is held 1 m above the floor for 50 seconds, the work done is:

Question # 6

Watt x second is unit 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

When velocity of moving body is doubled, the quantity which is also doubled is its:

Question # 10

A solar cell converts energy of the Sun into:

Question # 11

The dimensions of work

Question # 12

Which force is not a conservative force?

Question # 13

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

Question # 14

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:

Question # 15

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:`

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 Work has the dimensions as that of
A. Torque
B. Angular momentum
C. Linear momentum
D. Power
2 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
3 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
4 When a falling body hits ground, its KE changes to _____ energy.
A. Potential
B. Chemical
C. Mechanical
D. sound and heat
5 The types of mechanical energy is/are:
A. Kinetic energy
B. Potential energy
C. Both of these
D. None of these
6 A solar cell is made from:
A. Iron
B. Silicon
C. Germanium
D. Copper
7 When force and displacement are perpendicular to each other than work is equal to
A. Unity
B. Infinity
C. Zero
D. -Fd
8 Work-energy principle states that work done on the body by applied force is equal to change in:
A. Potential energy
B. Kinetic nergy
C. Linear momentum
D. None of these
9 Work is product of:
A. Force and velocity
B. Heat and energy
C. Force and displacement
D. None of these
10 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

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