Calculate the mutual inductance between ...

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`.

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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`.

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