A 12.0 V dc battery having no appreciable internal resistance, a 250 ohms resistor, a 15.0 mH inductor, and an open switch are all connected in series.
a. What is time constant in this circuit?
b. What is the voltage on the resistor when the switch is just closed?
c. What is the voltage on the inductor when the switch has been closed for a long time?
d. What is maximum energy stored in the conductor?
e. What is current in the circuit 7.00 x 10-6 s after the switch is closed?