Q. If a current of 3 A flowing in the primary coil is reduced to zero in 0.001 s, the induced emf in between the two coils is 15000 V, the coefficient of mutual induction is
A) 0.5 H
B) 5 H
C) 1.5 H
D) 10 H
Explanation
(b) As $e = MdI/dt$,
$\therefore\ \ M = \frac{edt}{dI} = - \frac{15000 \times 0.001}{3} = \ $5H
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.