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Two coils A and B having turns 300 and 6...

Two coils `A` and `B` having turns `300` and `600` respectively are placed near each other, on passing a current of `3.0` ampere in `A`, the flux linked with `A` is `1.2xx10^(-4)` and with `B` it is `9.0xx10^(-5)` weber. The mutual inuctance of the system is

A

`2 xx 10^(-5) H`

B

`3 xx 10^(-5) H`

C

`4 xx 10^(-5)H`

D

`6 xx 10^(-5) H`

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The correct Answer is:
B
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