An RL series circuit has the following components: 6.0 mH cool, 0.5 resistor and 12 volt battery plus ammeter and switch. What is the time constant of the circuit?
A series circuit has 12 volt battery, a 4.0 resistor, and a 12 mH inductor. If the switch to battery is closed at t=0, find the time required for the current circuit to reach 63% of its final value?