Consider the rate PL at which energy is being stored in the R-L circuit of Fig. 30.12. Answer these questions, in terms of E,R ,and L as needed: (a) What is PL at t = 0, just after the circuit is completed?
(b) What is PL at t - [infinity] , a long time after the circuit is completed?
(c) What is PL at the instant when i = E/2R one-half the current's final value?