First slide

Inductance

Question

The inductance between A and D in fig.(11) is

Moderate

A

1 h
B

9 h
C

0.66 h
D

0.99 h

Solution

The three inductance are connected in parallel. Hence
$\frac{1}{L} = \frac{1}{L_{1}} + \frac{1}{L_{2}} + \frac{1}{L_{3}} = \frac{1}{3} + \frac{1}{3} + \frac{1}{3}$
or L = 1h

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