S L R 2 R Consider the circuit on the left. The bat- tery has an EMF of 20.0 volts and negligi- ble internal resistance. The inductance is 0.30 H and the resistors are R1 = 25 S2 and 8 = 20.0 volts R, = 25.0 Q L = 0.30 H R2 = 50 N. Initially the switch S has been R2 = 50.0 Q open for a long time. a. The switch S is then closed. Find the currents through both resistors just after the switch is closed. b. Write down a quantitative (i.e. give numerical values), description of the current through the inductor as a function of time. c. Find the energy in the inductor after switch S has been closed a long time. d. After being closed for a long time, the switch S'is opened again. Find the total energy dissipated as heat by the resistors during the time interval of 0 to 4.0 milliseconds after the switch S is opened.

S L R 2 R Consider the circuit on the left. The bat- tery has an EMF of 20.0 volts and negligi- ble internal resistance. The inductance is 0.30 H and the resistors are R1 = 25 S2 and 8 = 20.0 volts R, = 25.0 Q L = 0.30 H R2 = 50 N. Initially the switch S has been R2 = 50.0 Q open for a long time. a. The switch S is then closed. Find the currents through both resistors just after the switch is closed. b. Write down a quantitative (i.e. give numerical values), description of the current through the inductor as a function of time. c. Find the energy in the inductor after switch S has been closed a long time. d. After being closed for a long time, the switch S'is opened again. Find the total energy dissipated as heat by the resistors during the time interval of 0 to 4.0 milliseconds after the switch S is opened.