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If the rate of flux of magnetic induction through each turn of a coil of resistance R and having N turns changes from ϕ1 to ϕ2 then the magnitude of current that passes through the coil is

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a
ϕ2-ϕ1R
b
Nϕ2-ϕ1R
c
ϕ2-ϕ1NR 
d
NRϕ2-ϕ1

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detailed solution

Correct option is B

To find the magnitude of the induced current, we can apply the equation i=ER

here E=Nϕ2-ϕ1

i=Nϕ2-ϕ1R

Initial rate of flux induction = ϕ1

Final rate of flux induction = ϕ2

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