Q. A varying current at the rate of $3\ A/s$ in a coil generates an e.m.f. of $8\ mV$ in a nearby coil. The mutual inductance of the two coils is
A) $2.66\ mH$
B) $2.66 \times 10^{- 3}mH$
C) $2.66\ H$
D) $0.266\ H$
Explanation
(a) $|e| = M\frac{di}{dt} \Rightarrow 8 \times 10^{- 3} = M \times 3 \Rightarrow M = 2.66mH$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.