Work, Energy and Power UPSC Questions

Physics

Work, Energy and Power MCQ Questions


13.
With reference to India’s defence, consider the following pairs:
Aircraft Type Description
I. Dornier-228 Maritime patrol aircraft
II. IL-76 Supersonic combat aircraft
III. C-17 Globemaster III  Military transport aircraft
How many of the pairs are correctly matched?
UPSC - 2025
A.
Only one
B.
Only two
C.
All three
D.
None
😑 View Answer Rough Work Error
ANSWER :
B. Only two
14.
Which of the following statement about work is true ?
(i) Work is done by a force on the body over a certain displacement
(ii) In case of work-energy (WE) theorem - The change in kinetic energy of a particle is equal to the work done on it by the net force
(iii) No work is done if the displacement is zero
(iv) The work and energy have same dimensions
A.
(i) and (ii) only
B.
(ii) and (iii) only
C.
(i), (ii) and (iv) only
D.
All the above
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ANSWER :
D. All the above
15.
The rate of doing work is called
A.
Force
B.
Power
C.
Acceleration
D.
Displacement
😑 View Answer Rough Work Error
ANSWER :
B. Power
16.
Recently, the term “pumped-storage hydropower” is actually and appropriately discussed in the context of which one of the following?
UPSC - 2024
A.
Irrigation of terraced crop fields
B.
Lift irrigation of cereal crops
C.
Long duration energy storage
D.
Rainwater harvesting system
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ANSWER :
C. Long duration energy storage
17.
Which of the physical quantities have the dimension ML2T-2
A.
Mechanical energy
B.
Kinetic energy
C.
Potential energy
D.
All the above
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ANSWER :
D. All the above
18.
What is the power utilised when work of 1000 J is done in 2 seconds?
A.
100 W
B.
200 W
C.
500 W
D.
1000 W
😑 View Answer Rough Work Error
ANSWER :
C. 500 W