First slide

Inductance

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

Moderate

A

2.66 mH
B

$2.66 \times 10^{- 3} mH$
C

2.66 H
D

0.2 66 H

Solution

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

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