Charge q is uniformly spread on thin rin...

Charge q is uniformly spread on thin ring of radius R. The ring rotates about its axis with a uniform frequency f Hz. The magnitude of magnetic induction at the centre of the ring is

`(mu_(0)gf)/(2piR)`

`(mu_(0)q)/(2pifR)`

`(mu_(0)q)/(2fR)`

`(mu_(0)qf)/(2R)`

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