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1 一單相、110V電容起動式感應電動機,輸出功率為300W,滿載效率為70%,功率因數為0.65,此電動機滿載電流為
A 6A
B 2.7A
C 4.2A
D 3.9A

300 = 110×I×0.65×0.7

I = 3000.7×110×0.65

=6A