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A disc of mass m has a charge Q distribu...

A disc of mass `m` has a charge `Q` distributed on its surface. It is rotating about an `XX'` with a angular velocity `omega`. The force acting on the disc is

A

zero

B

`omega RB // pi`

C

`2 Q omega BR`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
A
Since all the currents form loops in the uniform magnetic field, the force acting on the disc is zero
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