(P7.85)-The voltage υ (t) shown in Fig. P7.85a is given by the graph shown in Fig. P7.85b. If iL(0) = 0, answer the following questions

(P7.85)-The voltage υ (t) shown in Fig. P7.85a is given by the graph shown in Fig. P7.85b. If iL(0) = 0, answer the following questions:

(a) How much energy is stored in the inductor at t = 3 s?

(b) How much power is supplied by the source at t = 4 s?

(c) What is i(t = 6 s)?

(d) How much power is absorbed by the inductor at t = 3 s?

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