题目内容
(请给出正确答案)
[单选题]
u1=100sin(314t+60°),u2=200sin(314t-30°),两个电压的相位关系为()。
A.u1超前u2,30°
B.u1超前u2,90°
C.u2超前u1,30°
D.u2超前u1,90
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A.u1超前u2,30°
B.u1超前u2,90°
C.u2超前u1,30°
D.u2超前u1,90
A.u=50sin(ωt-30)V
B.u=50sin(ωt+30°)V
C.u=100sin(ωt-30°)V
D.u=100sin(ωt+30°)V
A.i1=2sin(314t-150°)A
B.i2=3sin(314t-90°)A
C.13=4sin(314t+75°)A
D.i2=3sin(314t-30°)A