Q. A coil having an inductance of $0.5\ H$ carries a current which is uniformly varying from zero to 10 ampere in 2 second. The e.m.f. (in volts) generated in the coil is
A) 10
B) 5
C) 2.5
D) 1.25
Explanation
(c) $|e| = L\left| \frac{di}{dt} \right| = 0.5 \times \frac{10}{2} = 2.5V$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.