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Question

Three pure inductances each of 3 H are connected as shown in fig. The equivalent inductance between points A and B is


A
1 H
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B
2 H
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C
3 H
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D
9 H
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Solution

The correct option is A 1 H
The circuit is equivalent to three inductances, each of value 3 H connected in parallel. The equivalent inductance L is given by
1L=1L+1L+1L=3L=33=1
or L=1 H. Hence the correct choice is (a).

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