At the moment that the switch is close in Fig. Find the equivalent resistance be

Question

At the moment that the switch is close in Fig. Find the equivalent resistance between point A and B Find the current flowing through each of the resistors in the circuit. After the switch is closed for a long time t rightarrow infinity. Find the equivalent resistance between points A and B and Find the current flowing through each of the resistors in the circuit. What is the charge on each capacitor, and the energy in the inductor, after the switch is closed for a long time i.e. t rightarrow infinity

Explanation / Answer

a) at t = 0, L2 and L1 will act as open switches, C will act as short
Reff = 40 ohm
b) Current , I = V/R = 0.25 A
Current through 20 ohm = 0.125A = current through 10 ohms
Current through 40 ohm = 0
Current through 30 ohms = 0.25 A
Current through R4 = 0
c) At t= infinity, L is short and C is open
Reff = 20 ohm
d) I = 0.5 A
R1 -> 0.125 -> R2 -> R3
R4 = 0.25
R5 = 0.25 A
R6 = 0

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