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An annular disc of copper with inner and...

An annular disc of copper with inner and outer radii r and R is rotating with a uniform angular speed w in a region where a uniform magnetic field B exists as shown. Then net emf induced between the inner edge and outer edge of the disc is

A

Zero

B

`(1)/(2)Bw(R-r)^(2)`

C

`(1)/(2)Bwr^(2)`

D

`(1)/(2)Bw(R^(2)-r^(2))`

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AAKASH SERIES-ELECTROMAGNETIC INDUCTION-EXERCISE-III
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