38 v(t)=155.56×sin(377t+30°)伏特，請問當 t=0 時之電壓為多少伏特？(A)155.56 (B)77.78 (C)110 (D)0

問題詳情

38 v(t)=155.56×sin(377t+30°)伏特，請問當 t=0 時之電壓為多少伏特？
(A)155.56
(B)77.78
(C)110
(D)0

參考答案

答案：B
難度：簡單0.848606
統計：A(7),B(213),C(18),D(13),E(0)

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