The circuit consists of three identical resistors R = 9 Ω each, two identical inductors L = 2 mH each, a capacitor C and an ideal 18 V battery. Immediately after closing the switch, find the current from the battery. [Image]
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Question

The circuit consists of three identical resistors R = 9 Ω each, two identical inductors L = 2 mH each, a capacitor C and an ideal 18 V battery. Immediately after closing the switch, find the current from the battery. [Image]

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G1 Physics · Accepted Answer

Step 1: At the moment of steady DC, ideal inductors offer negligible reactance: X(L)=ωL=0 for ω=0. Step 2: Replace each inductor with a short and simplify the resistor network in the original circuit figure. Step 3: Compute battery current I=V/Rₑᵩ; source shows the value 4 A (option C). The original network connections must be retained from the diagram. Final answer: (C) 4 A.