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

Mutual inductance of coils, $\quad\quad \quad\quad M=\frac{\mu_{0}\mu_{r}N_{1}N_{2}A}{l}.$ It is clear that mutual inductance of coils can be increased by increasing the number of turns in the coils.