Q. The self inductance of a coil is $5\ henry$, a current of $1\ amp\ $change to $2\ amp\ $within $5\ second$ through the coil. The value of induced e.m.f. will be
A) $10\ volt$
B) $0.10\ volt$
C) $1.0\ volt$
D) $100\ volt$
Explanation
(c) $e = - L\frac{di}{dt} \Rightarrow e = 5 \times \frac{1}{5} = 1\ volt$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.