若伏特與݅ 安培，可知V(t)與݅i(t)之間的相位關係為(A)v超前i 30° (B) v落後i 30° (C) v超前i 90° (D) v落後i 90°

問題詳情

2. 若伏特與݅ 安培，可知V(t)與݅i(t)之間的相位關係為
(A)v超前i 30°
(B) v落後i 30°
(C) v超前i 90°
(D) v落後i 90°

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