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Rate of charges of torque tau with defle...

Rate of charges of torque `tau` with deflection theta` is maximum for a magnet susended freely in a uniform magnetic field of induction B, when

A

`theta=0^(@)`

B

`theta=45^(@)`

C

`theta=60^(@)`

D

`theta=90^(@)`

Text Solution

Verified by Experts

The correct Answer is:
A
`tau=MB_(H) sintheta` or `(d"tau)/(d"theta)=MB_(H) costheta`
This will be maximum. When `theta=0^(@)`
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