Three pure inductances each of 3H are connected as shown in fig. The equivalent inductance between points A and B is
A
1H
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B
2H
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C
3H
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D
9H
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Solution
The correct option is A1H The circuit is equivalent to three inductances, each of value 3H connected in parallel. The equivalent inductance L′ is given by 1L′=1L+1L+1L=3L=33=1 or L′=1H. Hence the correct choice is (a).