Question

Mutual inductance of two coils can be increased by

• A. decreasing the number of turns in the coils
• B. increasing the number of turns in the coils
• C. winding the coils on wooden cores
• D. none of these.

Answer 1

The correct option is B increasing the number of turns in the coils

As M = $\frac{{\mu }_0{N}_1{N}_{2}A}{l}$
i.e M can be increased by increasing the numbers of turns in the coils.