Permanent magnetismEasy
Question
A bar magnet has a magnetic moment equal to 5 × 10-5 A-m2. It is supended in a magnetic field of 8π × 10-4 T. The magnet vibrates with a period of vibration equal to 15 sec. The moment of inertia of the magnet is :-
Options
A.5.2 × 10-7 kg - m2
B.11.25 × 10-7 kg - m2
C.22.5 × 10-7 kg - m2
D.7.16 × 10-7 kg - m2
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