50.某三相多極交流發電機,若其線圈節距與極距之比值為4/5,試求其節距因數(Kp)為何?
(A)sin72°
(B)cos72°
(C)sin144°
(D)cos144°
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統計: A(58), B(12), C(12), D(4), E(0) #3439563
統計: A(58), B(12), C(12), D(4), E(0) #3439563