Two coils of self inductances and are placed so close together that the effective flux in one coil is completely linked with the other. The mutual inductance between these coils is?
Step 1: Given data
Two coils having self-inductance,
Step 2: Calculating mutual inductance.
The mutual inductance between the coils is given by,
, where is the mutual inductance between the coils.
So,
Hence, option (C) is correct.