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a copper disc of diameter 20 cm makes 12...

a copper disc of diameter `20 cm` makes `1200` r.p.m. about its natural axis kept parallel to a uniform magnetic field of `10^(-2)T`. The potential difference between the centre and edge of the disc is

A

`6.28 xx 10^(-3) V`

B

`62.8 xx 10^(-3) V`

C

`0.628 xx 10^(-3) V`

D

`0.628 V`

Text Solution

Verified by Experts

The correct Answer is:
A
`e = (1)/(2)BR^(2) omega` where `omega = 2pi f`
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