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A thin circular disk of radius R is unif...

A thin circular disk of radius `R` is uniformly charged with density `sigma gt 0` per unit area.The disk rotates about its axis with a uniform angular speed `omega`.The magnetic moment of the disk is :

A

`2piR^4omegarho`

B

`piR^4omegarho`

C

`(piR^4)/2omegarho`

D

`(piR^4)/4omegarho`

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The correct Answer is:
D
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