Q. The mutual inductance of an induction coil is $5H$. In the primary coil, the current reduces from $5A$ to zero in $10^{- 3}s$. What is the induced emf in the secondary coil
A) $2500V$
B) $25000V$
C) $2510V$
D) Zero
Explanation
(b) $e = - M\frac{di}{dt} = - 5 \times \frac{( - 5)}{10^{- 3}} = 25000\ V$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.