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Q.

Figure shows a circuit that contains three identical resistors with resistance R = 9.0 Ω each, two identical inductors with inductance L = 2.0 mH each, and an ideal battery with emf ε = 18 V The current 'i' through the battery just after theswitch closed is :

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a

0.2 A

b

2 A

c

0 A

d

2 mA

answer is B.

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Detailed Solution

At t = 0, inductor behaves as open circuit so, i = εR=2A
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Figure shows a circuit that contains three identical resistors with resistance R = 9.0 Ω each, two identical inductors with inductance L = 2.0 mH each, and an ideal battery with emf ε = 18 V The current 'i' through the battery just after theswitch closed is :