题目内容
(请给出正确答案)
[单选题]
已知U=311sin(314t+50°),可求得()
A.U=311V,f=50Hz
B.U=220V,f=314Hz
C.U=220V,f=50Hz
D.U=311V,f=314Hz
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A.U=311V,f=50Hz
B.U=220V,f=314Hz
C.U=220V,f=50Hz
D.U=311V,f=314Hz
A.u=380sin(100t+180°)V
B.u=311sin(200πt+180°)V
C.u=220sin(628t+180°)V
D.u=-311sin100πtV
A.u=380sin314tv
B.u=537sin(314t+50°)v
C.u=380(314t+90°)v
D.380sin(314t-90°)v
A . Uu=311sin314t
B . Uu=311sin(314t-300)
C . Vu=311sin(314t-1500)
D . Vu=311sin(314t-1500)
E . Wu=311sin(314t+900)