Calculate the mutual inductance between two coils when a current of `4 A` changes to
Channel: Doubtnut
Date: 2020-07-12

Calculate the mutual inductance between two coils when a current of `4 A` changes to `12 A` in `0.5 s` in primary and induces an emf of `50 mV` in the secondary. Also, calculate the induced emf in the secondary if current in the primary changes from `3 A` to `9 A` is `0.02 s`.