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Two coils of self inductance 100 mH and ...

Two coils of self inductance `100 mH` and `400 mH` are placed very close to each other.Find the maximum mutual inductance between the two when `4 A` current passes through them

A

200 mH

B

300mH

C

`100sqrt(2) mH`

D

none of these

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The correct Answer is:
A
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