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A thin disc of radius R has charge Q dis...

A thin disc of radius R has charge Q distributed uniformly on its surface. The disc is rotated about one of its diametric axis with angular velocity `omega`. The magnetic moment of the arrangement is

A

`(QR^(2)omega)/(8)`

B

`(QR^(2)omega)/(4)`

C

`(QR^(2)omega)/(2)`

D

Zero

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The correct Answer is:
A
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