题目内容
(请给出正确答案)
[单选题]
已知某正弦电压的频率f = 50Hz,初相角j=30°,在 t = 0.02 s时瞬时值u(0.02) = 100 V,则其瞬时值表达式可为()。
A.u = 100 sin(50t+30° ) V
B.u = 141.4 sin(50pt+30° ) V
C.u = 200 sin(100pt+30° ) V
D.u = 282.8 sin(100pt+30° ) V
E.u = 282.8 sin(50pt+30° ) V
提问人:网友lcflyr
发布时间:2022-01-07