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

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

Question # 2

Work is a Quantity

Question # 3

Work is a scalar product of

Question # 4

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

Question # 5

Work done is independent of path followed in _______

Question # 6

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 # 7

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

Question # 8

The tidal energy is due to gravitational pull of :

Question # 9

Work done along a closed path in a gravitational field is:

Question # 10

The unit of work in CGS system is

Question # 11

Which force is not a conservative force:

Question # 12

A solar cell is made from:

Question # 13

Work has the dimensions as that of

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

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:

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 The commercial unit of electrical energy is :
A. K Watt
B. KWH
C. Horse power
D. Joule
2 Work done is maximum when angle between force and displacement is:
A. 0°
B. 90°
C. 180°
D. None of these
3 Work done is maximum when angle between force and displacement is
A. 0°
B. 90°
C. 180°
D. None of these
4 Work done is independent of path followed in _______
A. Gravitational field
B. Magnetic field
C. Electric field
D. All of these
5 Which of the following is not a unit of power:
A. J-sec
B. Watt
C. N m/sec
D. Horsepower
6 Tick the conservation force:
A. Tension in a string
B. Air resistance force
C. Elastic spring
D. Frictional force
7 Work done is lowering the bucket into the well is:
A. Zero
B. Positive
C. Negative
D. None of these
8 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
9 Work is product of:
A. Force and velocity
B. Heat and energy
C. Force and displacement
D. None of these
10 The work done on the body will be zero if:
A. No force is applied on the body
B. Force is applied but no displacement
C. Angle between F(force) and d(displacement) is 90°
D. All of these are correct

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