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[单选题]
已知正弦交流电压的频率f=50Hz,初相位角φ=30°,在t=0时的瞬时值u(0)=100V,则该正弦电压的瞬时值表达式为()
A.100sin(50t+30°)
B.141.4sin(50πt)
C.200sin(100πt+30°)
D.200sin(50πt+30°)
提问人:网友lixin080108
发布时间:2022-01-07
A.100sin(50t+30°)
B.141.4sin(50πt)
C.200sin(100πt+30°)
D.200sin(50πt+30°)
A、u=220sin(50t + 30°)V
B、u=220sin(314t + 30°)V
C、u=220sin(50t-30°)V
D、u=220sin(314t-30°)V
A. e=220sin(314t+30°)
B. e=320sin(314t+30°)
C. e=220sin(314t-30°)
D. e=220
A、A、u=220sin314t
B、B、u=314sin314t
C、C、u=314sin220t
D、D、u=220sin220t
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