First slide

Inductance

Question

The average e.m.f. induced in a coil in which the current changes from 2 ampere to 4 ampere in 0.05 second is 8 volt. What is the self inductance of the coil ?

Moderate

A

0.1 H
B

0.2 H
C

0.4 H
D

0.8 H

Solution

$e = - L \frac{di}{dt} \Rightarrow 8 = L \frac{(4 - 2)}{0.05} \Rightarrow L = 0.2 H$

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