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Two coils of self-inductance L(1) and L(...

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

A

`M = k sqrt ( L _(1) L _(2))`

B

`M = k sqrt ((L _(1))/(L _(2)))`

C

`M = k sqrt (L _(1) + L _(2))`

D

None of the above

Text Solution

Verified by Experts

The correct Answer is:
A
If two coils of self inductance `L _(1) and L _(2)` arew coupled together, their mutuals inductance becomes `M = k sqrt (L _(1) L _(2))` where k = coupling constant whose value lies between 0 and 1.
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