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A copper disc of the radius 0.1 m is rot...

A copper disc of the radius 0.1 m is rotated about its centre with 20 revolutions per second in a uniform magnetic field of 0.1 T with its plane perpendicular to the field. The emf induced across the radius of the disc is-

A

`(pi)/(10)"volt"`

B

`(pi)/(100)"volt"`

C

`(pi)/(1000)"volt"`

D

zero

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The correct Answer is:
B
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