Two coils of inductances L(1), and L(2) ...

Two coils of inductances `L_(1)`, and `L_(2)` are linked such that their mutual inductance is `M`

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Two coils of self-inductance L_(1) and L_(2) are placed closed to each other so that total flux in one coil is completely linked with other. If M is mutual inductance between them, then

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