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A conducting circular loop is placed in ...

A conducting circular loop is placed in a uniform magnetic field B = 0.025 T with its place perpendicular to the loop. The radius of the loop is made to shrink at a constant rate of `1 mms^-1`. What is the induced e.m.f. when the radius is 2cm?

A

`2pimuV`

B

`pi/2muv`

C

`pimuV`

D

`2muV`

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