Q. Two circuits have coefficient of mutual induction of $0.09\ henry$. Average e.m.f. induced in the secondary by a change of current from 0 to $20\ ampere$ in $0.006\ second$ in the primary will be
A) $120\ V$
B) $80\ V$
C) $200\ V$
D) $300\ V$
Explanation
(d) $e = M\frac{di}{dt} = 0.09 \times \frac{20}{0.006} = 300\ V$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.