10.某電源電流的相位角為 0°,頻率為 60Hz,電壓超前電流相位角為 30°,電壓的有效值為 100V,求瞬時電壓為何?
(A) 200sin(377t + 30° ) V
(B) 141sin(377t + 30° ) V
(C) 100sin(377t + 30° ) V
(D) 70.7sin(377t + 30° ) V .
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統計: A(12), B(499), C(53), D(39), E(0) #1961421
統計: A(12), B(499), C(53), D(39), E(0) #1961421