30 有一交流電路之電壓 v (t) =100sin(377 t + 60° )V 、電流i (t) =10sin(377 t - 20° )A ,則其電壓與電流之相位關係為何?
(A)電壓超前電流 60°
(B)電壓落後電流 20°
(C)電壓超前電流 80°
(D)電壓落後電流 60°
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統計: A(37), B(23), C(883), D(16), E(0) #1085930
統計: A(37), B(23), C(883), D(16), E(0) #1085930