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The time period of a bar magnet suspende...

The time period of a bar magnet suspended horizontally in the earth's magnetic field and allowed to oscillate

A

Is directly proportional to the square root of its mass

B

Is directly proportional to its pole strength

C

Is inversely proportional to its magnetic moment

D

Decreases if the length increases but pole strength remains same

Text Solution

Verified by Experts

The correct Answer is:
A
`T=2pisqrt(I/(MB_(H))) and I=(w(l^(2)+b^(2)))/12, :. T prop sqrt(w)`
(w= Mass of the magnet)
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