A bar magnet of moment of inertia I is vibrated in a magnetic field of induction 
. The time period of vibration is 12 s. The magnetic moment of the magnet is 
. The moment of inertia of the magnet is (in 
) approximately
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
Given, 
and 
We know that, 
(squaring both sides)
So, 
or 
In this question, the option is approximately equivalent to 
, so the answer is
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