Question: Consider the circuit above, which is powered by a 9-V battery. Switch S is opened at t = 0 after having been closed for a long time.
(a) How much energy is stored in the inductor at t = 0? mJ
(b) What is the instantaneous rate of change of the inductor's energy at t = 0? W
(c) What is the average rate of change of the inductor's energy between t = 0.0 and t = 1.0 s? W
(d) How long does it take for the current in the inductor to reach 0.050 times its initial value? ms
