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Online Tests
Physics ECAT Pre Engineering Chapter 4 Work and Energy Online Test MCQs With Answers
Question # 1
Work is a:
Choose an answer
Scalar quantity
Vector quantity
Base quantity
None of these
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Question # 2
A body moves a distance of 10 m along a straight line under the action of a force of 5 N and work done is 25J. the angle which the force makes with the direction of motion will be:
Choose an answer
60
°
90
°
30
°
0
°
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Question # 3
A two Kg block is held 1 m above the floor for 50 seconds, the work done is:
Choose an answer
Zero
10.2 J
100 J
980 J
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Question # 4
Area under the force displacement graph gives
Choose an answer
Power
Work
Heat
Energy
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Question # 5
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:`
Choose an answer
Minimum work
Maximum work
Zero work
Negative work
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Question # 6
When force and displacement are perpendicular to each other than work is equal to
Choose an answer
Unity
Infinity
Zero
-Fd
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Question # 7
A solar cell is made from:
Choose an answer
Iron
Silicon
Germanium
Copper
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Question # 8
When two protons are brought are brought closer potential energy of both of them:
Choose an answer
Increases
Decreases
Remains same
None of these
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Question # 9
The work done 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 # 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:
Choose an answer
+5 x 10
1
J
+5 x 10
2
J
+5 x 10
3
J
+5 x 10
4
J
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Question # 11
Work is a always done on a body when
Choose an answer
A force acts on it
It moves through certain distance
None of A or B is correct
Both A and B are correct
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Question # 12
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 # 13
The types of mechanical energy is/are:
Choose an answer
Kinetic energy
Potential energy
Both of these
None of these
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Question # 14
Work done along a closed path in a gravitational field is:
Choose an answer
Maximum
Minimum
Zero
Unity
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Question # 15
When a body moves against the force of friction on a horizontal plane, the work done by the body is:
Choose an answer
Positive
Negative
Zero
None of these
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Question # 16
If force and displacement are in opposite direction, the work done is taken as:
Choose an answer
Positive work
Negative work
Zero work
Infinte work
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