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 is a:

Question # 2

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 # 3

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

Question # 4

Tick the conservation force:

Question # 5

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

Question # 6

A solar cell converts energy of the Sun into:

Question # 7

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

Question # 8

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 # 9

Work is a

Question # 10

Teh consumption of energy by a 1000 watt heater in half an hour is:

Question # 11

The tidal energy is due to gravitational pull of :

Question # 12

Watt x second is unit of:

Question # 13

If one newton force acts on a body and displaces the body through 1m work done on body is

Question # 14

Area under the force displacement graph gives

Question # 15

When a falling body hits ground, its KE changes to _____ energy.

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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 done is lowering the bucket into the well is:
A. Zero
B. Positive
C. Negative
D. None of these
3 Work has the dimension as that of:
A. Torque
B. Angular momentum
C. Linear momentum
D. Power
4 Work done on a body by gravity in lifting it up to certain height is
A. Maximum
B. Minimum
C. Zero
D. Negative
5 The tidal energy is produced due to rotation of Earth relative to:
A. Moon
B. Sun
C. Oceans
D. Water
6 If work is done at the rate of 2 k j per second, then total work done is half an hour will be:
A. 0.5 Kwn
B. 2 Kwh
C. 1 Kwh
D. None of these
7 The work done by a force, keeping an object in circular motion with constant speed is:
A. Zero J
B. 1 J
C. 0.1 J
D. 0.01 J
8 The consumption of energy by a 60 W bulb in 2 minutes is:
A. 2 watt-hour
B. 120 watt-hour
C. 30 watt-hour
D. None of these
9 In the force applied to parallel to the direction of motion, then the work done is:
A. Positive
B. Negative
C. Zero
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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