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Two coils are having self-inductance of 5 mH and 10 mH and a mutual inductance of 0.5 mH in a differential connection. The equivalent inductance of the combination is ___________

Two coils are having self-inductance of 5 mH and 10 mH and a mutual inductance of 0.5 mH in a differential connection. The equivalent inductance of the combination is ___________ Correct Answer 14 mH

When 2 coils are connected in series, then effective inductance, LEFF = L1 + L2 ± 2M For this case, LEFF = L1 + L2 – 2M = 5 + 10 – 2 × 0.5 = 15 – 1 = 14 mH.

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