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Coefficient of coupling between two coil...

Coefficient of coupling between two coils of self-inductances `L_(1)` and `L_(2)` is unity. It means

A

`50%` flux of `L_(1)` is linked with `L_(2)`

B

`100%` flux of `L_(1)` is linked with `L_(2)`

C

`sqrt(L_(1))` times of flux of `L_(1)` is linked with `L_(2)`

D

None of these

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The correct Answer is:
B
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