Q. An e.m.f. of $5\ volt$ is produced by a self inductance, when the current changes at a steady rate from $3\ A$ to $2\ A$ in 1 millisecond. The value of self inductance is
A) Zero
B) $5\ H$
C) $5000\ H$
D) $5\ mH$
Explanation
(d) $L = \frac{e}{di/dt} = \frac{5}{(3 - 2)/10^{- 3}} = \frac{5}{1} \times 10^{- 3} = 5milli\ henry$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.