Basic Concepts of Rotational Motion NEET Questions

Physics - Rotational Motion

Basic Concepts of Rotational Motion MCQ Questions


13.
A flywheel is used in machines to:
A.
Increase energy efficiency
B.
Reduce energy loss
C.
Increase speed
D.
Reduce speed fluctuations
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ANSWER :
D. Reduce speed fluctuations
14.
A uniform rod rotating about one end has its center of mass:
A.
At the center
B.
At 1/3rd length
C.
At 1/2 length
D.
At the fixed end
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ANSWER :
C. At 1/2 length
15.
The radius of gyration is defined as:
A.
A point where mass is concentrated
B.
Point mass assumption
C.
Equivalent mass distribution
D.
A point with minimum energy
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ANSWER :
C. Equivalent mass distribution
16.
The relation between angular momentum and torque is given by:
A.
T = L/ω
B.
T = dL/dt
C.
T = Iα
D.
T = ωL
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ANSWER :
C. T = Iα
17.
For a rolling object, the ratio of rotational kinetic energy to total kinetic energy is:
A.
1/4
B.
1/2
C.
2/3
D.
1
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ANSWER :
C. 2/3
18.
Which of the following does NOT affect the moment of inertia?
A.
Mass
B.
Shape
C.
Density
D.
Axis of rotation
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ANSWER :
D. Axis of rotation