The overall inductance of two coils connected in series, with mutual inductance aiding self inductance is L1 with mutual inductance opposing self-inductance the overall inductance is L2.

The mutual inductance M is given by

A. L1 + L2

B. L1 - L2

C. 1/4 (L1 - L2)

D. 1/2 (L1 + L2)

## Show Answer

Answer: C

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