MCQ
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 ?......$H$
- A$0.1$
- ✓$0.2$
- C$0.4$
- D$0.8 $
✓
Answer
Correct option: B.
$0.2$
b
(b) $e = - L\frac{{di}}{{dt}} \Rightarrow 8 = L\frac{{(4 - 2)}}{{0.05}} \Rightarrow L = 0.2\;H$
(b) $e = - L\frac{{di}}{{dt}} \Rightarrow 8 = L\frac{{(4 - 2)}}{{0.05}} \Rightarrow L = 0.2\;H$
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