A DC voltage source provides a voltage V = 12.0V and is connected to a resistor of resistance R = 150 ohms and an ideal inductor with inductance L, forming the circuit. For a long time, the switch has been in the position shown, so that a constant current has been built up in the circuit by the voltage source. At t=0 the switch is thrown open to remove the voltage source from the circuit. At time t after t=0, the current through the inductor and the voltage across the inductor is given by, respectively, I(t) and V(t). If the inductor has inductance 60.0 mH, what is the time constant For this circuit?
