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Electric Field

Two coils of ...

Question

Two coils of self-inductances $2 m H$ and $8 m H$ are placed so close together that the effective flux in one coil is completely linked with the other. The mutual inductance between these coils is:

A

10 m H

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B

6 m H

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C

4 m H

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D

16 m H

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Solution

The correct option is C $4 m H$
Mutual inductance M= $\sqrt{L_{1} \times L_{2}} = \sqrt{2 \times 8} = 4$ mH

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