An electromotive force E(t) [240, 0≤t≤ 50 {o, t> 50 is applied to an LR-series circuit in which the inductance is 40 henries and the resistance is 4 ohms. Find the current i(t) if i(0) = 0. , 0 st≤ 50 i(t) = t> 50

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