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Online Tests
ECAT Pre General Science Physics Chapter 4 Work and Energy Online Test MCQs With Answers
Question # 1
The energy stored int he water of the dam is:
Choose an answer
Electric energy
Kinetic energy
Potential energy
None of these
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Question # 2
The consumption of energy by a 60 W bulb in 2 minutes is:
Choose an answer
2 watt-hour
120 watt-hour
30 watt-hour
None of these
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Question # 3
Work done in lower and bucket into the well is:
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Zero
Positive
Negative
None of these
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Question # 4
The space around the earth in which its gravitational force acts on a body is called
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Electric Field
Gravitational field
Magnetic field
Conservative field
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Question # 5
Work is a scalar product of
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Force, Velocity
Velocity, Displacement
Force, Displacement
Force, Momentum
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Question # 6
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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Minimum work
Maximum work
Zero work
Negative work
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Question # 7
When velocity of moving body is doubled, the quantity which is also doubled is its:
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K.E.
Acceleration
Momentum
P.E.
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Question # 8
Work done on a body by gravity in lifting it up to certain height is
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Maximum
Minimum
Zero
Negative
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Question # 9
When a force of 0.5 N displaces a body through a distance of 2m in the direction of force, the work done is
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0.5 J
2 J
0.25 J
1 J
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Question # 10
The Space around the Earth within which it exerts a force of attraction on other bodies is known as
Choose an answer
Nuclear field
Conservative field
Electric field
Gravitational field
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Question # 11
The ultimate source of money sources of energy is:
Choose an answer
Sun
Air
Water
Petroleum
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Question # 12
The work performed on an object does not depend on
Choose an answer
Force applied
Angle at which force is inclined to the displacement
Initial velocity of the object
Displacement
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Question # 13
When a body moves against the force of friction on a horizontal plane, the work done by the body is:
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Positive
Negative
Zero
None of these
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Question # 14
The amount of coal used since 1945 up till now as compared to that used in the whole of history before that is
Choose an answer
Much more
Very small
No amount at all
None of these
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Question # 15
When a wall is pushed by a person very strongly, he has done:
Choose an answer
Maximum work
Zero work
Positive work
Negative work
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Question # 16
A field in which the work done is moving a body along closed path is zero is called:
Choose an answer
Nuclear filed
Conservative field
Gravitational field
Non-conservative field
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Question # 17
The work done on the body will be zero if:
Choose an answer
No force is applied on the body
Force is applied but no displacement
Angle between F(force) and d(displacement) is 90
°
All of these are correct
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Question # 18
Work done is maximum when angle between force and displacement is:
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0
°
90
°
180
°
None of these
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Question # 19
The work done in moving a body between two points in a conservative field is independent of the
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Direction
Force applied
Path followed by the body
Power
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Question # 20
Maximum work is done when force and displacement are
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Parallel
Antiparallel
Perpendicular
Both a and b
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Question # 21
Which of the following type of force can do no work on the particle on which it acts:
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Frictional force
Gravitational force
Electric force
Centripetal force
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Question # 22
Work has the dimensions as that of
Choose an answer
Torque
Angular momentum
Linear momentum
Power
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Question # 23
The work done moving a body between two points in a conservation field is independent of the:
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Direction
Force applied
Path followed by the body `
Power
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Question # 24
The angle between centripetal force and displacement of the body moving in a circle is:
Choose an answer
0
°
90
°
180
°
None of these
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Question # 25
Tick the conservative force
Choose an answer
Tension in a string
Air resistance
Elastic spring
Frictional force
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Question # 26
Tick the conservation force:
Choose an answer
Tension in a string
Air resistance force
Elastic spring
Frictional force
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Question # 27
The space around the earth within which it expects a force of attraction on other bodies is known as:
Choose an answer
Nuclear field
Conservative field
Electric field
Gravitational field
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Question # 28
A field in which the work done in moving a body along closed path is zero is called
Choose an answer
Nuclear Field
Conservative field
Gravitational field
Non-conservative field
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Question # 29
The work done in moving a body between two points in a conservation field is independent of the:
Choose an answer
Direction
Force applied
Path followed by the body
Power
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Question # 30
A solar cell is made from:
Choose an answer
Iron
Silicon
Germanium
Copper
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Question # 31
If work is done at the rate of 2 k j per second, then total work done is half an hour will be:
Choose an answer
0.5 Kwn
2 Kwh
1 Kwh
None of these
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