Question

Two coils are wound on a common magnetic core. The sign of mutual inductance m for finding out effective inductance of each coil is positive if

Answer 1

Two coils are wound on a common magnetic field core. The sign of mutual inductance between Coils. The mutual inductance that exists between the two coils can be greatly increased by positioning them on a common soft iron core or by increasing the number of turns of either coil as would be found in a transformer.