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A bar has a magnetic moment equal to 5xx...

A bar has a magnetic moment equal to `5xx10^(-5) weberxxm`. It is suspended in a magnetic field which has a magnetic induction (B) equal to `8pixx10^(-4)` tesla. The magnet vibrates with a period of vibration equal to 15 sec. The moment of intertia of the magnet is

A

`4.54 x 10^(4)` kg `m^(2)`

B

`4.54 x 10^(-5)` kg `m^(2)`

C

`4.54 x 10^(-4)` kg `m^(2)`

D

`4.54 x 10^(-4)` kg `m^(5)`

Text Solution

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The correct Answer is:
D
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