Q. The number of turns of primary and secondary coils of a transformer are 5 and 10 respectively and the mutual inductance of the transformer is $25\ henry$. Now the number of turns in the primary and secondary of the transformer are made 10 and 5 respectively. The mutual inductance of the transformer in $henry$ will be
A) 6.25
B) 12.5
C) 25
D) 50
Explanation
(c) $M = \frac{\mu_{0}N_{1}N_{2}A}{l}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.