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The equivalent inductances of two coils 2H and 5H in series aiding flux with mutual inductance of 3H is

The equivalent inductances of two coils 2H and 5H in series aiding flux with mutual inductance of 3H is Correct Answer 13

The equivalent inductance of two coils in series is given by L = L1 + L2 + 2M, where L1 and L2 are the self inductances and M is the mutual inductance. Thus L = 2 + 5 + 2(3) = 13H.

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