I have a circuit problem. There is a 30 V power source conected in series with a switch and a ten ohm resistor. The circuit then spling to an inductor of 10 mH and a 20 ohm resistor. I am having difficulty finding the current across the 20 ohm resistor. I got the current immediately after the switch closes as 1 A. Then a long time after the switch closed the current across the 20 ohm resistor is 0 A. What is the current when the switch is reopened. The circuit is now an LR circuit L = 10mH and R = 20 ohms. by V=IR I thought that the current across the resistor would be 1.5 A. However, it is not. Is V of the inductor different than the power supply? If so, I con't find a rule governing that. Thanks for any help.