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1 有一部直流長分路複激電動機,電樞繞組的電阻0.03歐姆,串激繞組的電阻0.02歐姆,接電源電壓200伏特,當電樞電流為40安培時,試求該電動機之應電勢為多少伏特?
A 205V
B 202V
C 198V
D 195V

E = V - IA(RA + RS) =200 - 40 × (0.03 + 0.02) = 198V