The switch in figure has been open for a long time. It is closed at t = 0 s. What is the current through the R₁ resistor? (a) Immediately after the switch is closed? (b) After the switch has been closed a long time? (c) Immediately after the switch is reopened? R₁ = 20.0 ; R₂ R₂ = 30.0 ; L=12 mH; E R₁ ww elle = 40 V

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