Question

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

Answer 1

Answer: (A)

2.66 mH

Answer 2

$|e| = M\frac{di}{dt} \Rightarrow 8 \times 10^{- 3} = M \times 3 \Rightarrow A_{1} = 2.66mH$