Consider the circuit shown in the figure.The battery has emf ε = 25 volts and negligible internal resistance.The inductance is and the resistances are R1 = 12 Ω and
R2 = 9.0 Ω.Initially the switch S is open and no currents flow.Then the switch is closed. (a)What is the current in the resistor R1 just after the switch is closed?
(b)After leaving the switch closed for a very long time,it is opened again.Just after it is opened,what is the current in R1?
Correct Answer:
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