Two coils of self inductance L1 and L2 a...

Two coils of self inductance `L_1` and `L_2` are placed near each other so that the total flux in one coil is partially linked with the other. Their mutual inductance (M) will be given by

`M=L_1L_2`

`M=sqrt(L_1L_2)`

`Mgtsqrt(L_1L_2)`

`Mltsqrt(L_1L_2)`

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