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A short bar magnet is oscillating in a m...

A short bar magnet is oscillating in a magnetic field and its time period is `2` seconds. If another piece of brass of double meoment of inertia be placed over that magnet the time period of that combination in that field is

A

`2sqrt3S`

B

`2sqrt2S`

C

`2S`

D

`1//sqrt2 S`

Text Solution

Verified by Experts

The correct Answer is:
A
`T=2pisqrt((I)/(MB_(H)))` and `(T_(1))/(T_(2))=sqrt((I_(1))/(I_(2)))=sqrt((I)/(3I))=(1)/(sqrt3)`
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