Angular Momentum and Conservation of Angular Momentum and its Applications NEET Questions

Physics - Rotational Motion

Angular Momentum and Conservation of Angular Momentum and its Applications MCQ Questions


13.
A solid disc of mass 2 kg and radius 0.5 m rotates about its symmetry axis at 10 rad/s. Its angular momentum is (I = MR²/2):
A.
1.25 kg·m²/s
B.
2.5 kg·m²/s
C.
5 kg·m²/s
D.
10 kg·m²/s
😑 View Answer Rough Work Error
ANSWER :
B. 2.5 kg·m²/s
14.
A circular ring of mass 1 kg and radius 0.4 m rotates about its central axis at 20 rad/s. Its angular momentum is (I = MR²):
A.
0.16 kg·m²/s
B.
1.6 kg·m²/s
C.
3.2 kg·m²/s
D.
6.4 kg·m²/s
😑 View Answer Rough Work Error
ANSWER :
C. 3.2 kg·m²/s
15.
A solid sphere of mass 5 kg and radius 0.1 m rotates about a diameter at 6 rad/s. Its angular momentum is (I = 2MR²/5):
A.
0.12 kg·m²/s
B.
0.6 kg·m²/s
C.
1.2 kg·m²/s
D.
0.06 kg·m²/s
😑 View Answer Rough Work Error
ANSWER :
A. 0.12 kg·m²/s
16.
A flywheel has moment of inertia 4 kg·m² and rotates at 50 rev/s. Its angular momentum is approximately:
A.
200 kg·m²/s
B.
100π kg·m²/s
C.
400π kg·m²/s
D.
50π kg·m²/s
😑 View Answer Rough Work Error
ANSWER :
C. 400π kg·m²/s
17.
If a rigid body's angular velocity is doubled while its moment of inertia is unchanged, its angular momentum:
A.
Remains the same
B.
Doubles
C.
Becomes four times
D.
Becomes half
😑 View Answer Rough Work Error
ANSWER :
B. Doubles
18.
If both the moment of inertia and angular velocity of a rotating body are doubled, the new angular momentum becomes:
A.
Same
B.
Double the original
C.
Four times the original
D.
Half the original
😑 View Answer Rough Work Error
ANSWER :
C. Four times the original