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1. In a series R-L circuit when excited by a 1 volt battery the current is 1 - e-t. If it is excited by a source 2 sin t, the current will be
(A): 2 sin (t + 45°) + e-t
(B): 2 sin (t - 45°) + e-t
(C): sin (t + 45°) + e-t
(D): sin (t - 45°) + e-t
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