College Physics 10th Edition by Raymond Serway,Chris Vuille

Exercise 24

Consider the circuit shown in Figure P20.43. Take = 6.00 V, L = 8.00 mH, and R = 4.00 . (a) What is the inductive time constant of the circuit (b) Calculate the current in the circuit 250 s after the switch is closed. (c) What is the value of the final steady-state current (d) How long does it take the current to reach 80.0% of its maximum value