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

Answer: (B)

Increasing the number of turns in the coils

Answer 2

As $M = \frac{\mu_{0}N_{1}N_{2}A}{l}$

i.e. M can be increased by increasing the number of turns in the coils.