問題詳情
11. 兩個電壓時間函數v1(t)與v2(t)，若v1(t)的相位超前v2(t)為60 °，則下列何者正確？
(A) v1 (t)=20 sin ( 314t–30 °)V、v2 (t)=20cos(314 t– 60°)V
(B) v1 (t)=20cos( 314t–60 °)V、v2 (t)=20sin (314 t– 30°)V
(C) v1 (t)=20sin( 314t–30 °)V、v2 (t)=20sin (314 t– 60°)V
(D) v1 (t)=20 cos(314 t–30 °)V、v2 (t)=20sin (314 t– 60°)V
參考答案
答案：B
難度：非常簡單0.833
書單：沒有書單，新增