Two coils have a mutual inductance 0.005...

Two coils have a mutual inductance `0.005 H`. The current changes in the first coil according to equation `I=I_(0)sin omegat`, where `I_(0)=10A` and `omega=100pi` radian/sec. The maximum value of e.m.f. in the second coil is

`2pi`

`5pi`

`pi`

`4pi`

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