Q. The current passing through a choke coil of 5 H is decreasing at the rate of 2 $As^{- 1}$. The emf developed across the coil is
A) $- 10$ V
B) + 10 V
C) 2.5 V
D) $- 2.5$ V
Explanation
(b) $e = \ - LdI/dt$ = $- 5\ \times ( - 2) = + 10$ V
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.