In Fig. 27.26, take ?₀ = 12 V, R = 2.7 ?, and L = 20 H. Initially the switch is in position B and there?s no current anywhere. At t = 0 the switch is thrown to position A, and at t = 10 s it?s returned to B. Find the inductor current at (a) t = 5.0 s and (b) t = 15 s.

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Świtching to B takes the With switch at A, current builds up. A battery out of the circuit. The current decays exponentially. R B. R V EL L (а) (b) ll ww ele