Consider the circuit in Figure P32.17, taking Є = 6.00 V, L = 8.00 mH, and R

Question:

Consider the circuit in Figure P32.17, taking Є = 6.00 V, L = 8.00 mH, and R = 4.00 Ω.
(a) What is the inductive time constant of the circuit?
(b) Calculate the current in the circuit 250μs 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?