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  4. Mutual inductance of two coils can be increased by

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Q. Mutual inductance of two coils can be increased by

AIIMSAIIMS 2015Electromagnetic Induction

Solution:

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.