Q. The mutual inductance between two coils is $1.25\ henry$. If the current in the primary changes at the rate of $80\ ampere/second$, then the induced e.m.f. in the secondary is
A) $12.5\ V$
B) $64.0\ V$
C) $0.016\ V$
D) $100.0\ V$
Explanation
(d) $e = M\frac{di}{dt} = 1.25 \times 80 = 100\ V$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.