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A charge q is uniformly distributed on a...

A charge `q` is uniformly distributed on a non-conducting disc of radius `R`. It is rotated with an angular speed `omega` about an axis passing through the centre of mass of the disc and perpendicular to its plane. Find the magnetic moment of the disc.

A

`(mu_0Qomega)/(2 pi R)`

B

`(mu_0Qomega)/(pi R)`

C

`(mu_0Qomega)/(4pi R)`

D

`(2mu_0Qomega)/(pi R)`

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