Conservative and Non Conservative Forces NEET Questions

Physics - Work, Energy, and Power

Conservative and Non Conservative Forces MCQ Questions


13.
What happens when a system has both conservative and non-conservative forces?
A.
Total energy increases
B.
Only kinetic energy is affected
C.
Potential energy is reduced
D.
Total energy is lost
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ANSWER :
A. Total energy increases
14.
A force is said to be conservative if:

NEET - 2018

A.
Work done depends only on the initial and final positions
B.
Work done depends on the path followed
C.
Work done is zero when the displacement is zero
D.
None of the above
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ANSWER :
A. Work done depends only on the initial and final positions
15.
If only conservative forces act on a system, what is true about its total mechanical energy?
A.
Remains constant
B.
Always increasing
C.
Constant but fluctuating
D.
Always decreasing
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ANSWER :
A. Remains constant
16.
Which of these situations involves work done by a conservative force?
A.
Lifting a book
B.
Throwing an object up
C.
A roller coaster ride
D.
An electric motor
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ANSWER :
C. A roller coaster ride
17.
A rolling ball comes to rest due to:
A.
Gravitational force
B.
Air resistance
C.
Friction
D.
Tension force
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ANSWER :
B. Air resistance
18.
Which of these forces does NOT contribute to a potential energy function?
A.
Electrostatic force
B.
Gravity
C.
Spring force
D.
Magnetic force
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ANSWER :
D. Magnetic force