First slide

Inductance

Question

The current through choke coil increases form zero to 6A in 0.3 seconds and an induced e.m.f. of 30 V is produced. The inductance of the coil of choke is

Moderate

A

5 H
B

2.5 H
C

1.5 H
D

2 H

Solution

$| e | = L \frac{di}{dt} \Rightarrow 30 = L \times \frac{(6 - 0)}{0 .3} \Rightarrow L = 1 .5 H$

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