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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 E = 18 V. The current 'i' through the battery just after the switch is closed is:

1. 0.2 A
2. 2 A
3. 0
4. 2 mA

Correct answer: 0

Solution

Just after the switch is closed, the inductors behave as open circuits because the current through an inductor cannot change instantaneously. This means no current flows through the circuit initially, so the current 'i' through the battery is 0.

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