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The equivalent inductance of two coils with series opposing flux having inductances 7H and 2H with a mutual inductance of 1H.

The equivalent inductance of two coils with series opposing flux having inductances 7H and 2H with a mutual inductance of 1H. Correct Answer 7

The equivalent inductance of two coils in series with opposing flux is L = L1 + L2 – 2M, where L1 and L2 are the self inductances and M is the mutual inductance. Thus L = 7 + 2 – 2(1) = 7H.

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