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Two coils of self-inductance 2mH and 8 ...

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

A

`10 mH`

B

`6 mH`

C

`4 mH`

D

`16 mH`

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The correct Answer is:
c
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