An electromotive force is applied to an LR-series circuit in which the inductance is 20 henries and

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An electromotive force

120, 0<1s 20 E(f) lo, [0, t> 20


is applied to an LR-series circuit in which the inductance is 20 henries and the resistance is 2 ohms. Find the current i(t) if i(0) = 0.

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