u1=U1msin(314t+30º),u2=U2msin(314t-60º),则u= u1+ u2的有效值是( )。 -题库考试答案搜索网

u₁=U_1msin(314t+30º),u₂=U_2msin(314t-60º),则u= u₁+ u₂的有效值是( )。

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2021-07-18 00:09

A、(U1m+U2m)/2
B、U1m+U2m
C、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/159011846522694ffc803f3e445b982b428e7bd5fcdcaimage1.png"style="width:97px;height:26px;"/>
D、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/15901184652837355cef73e574a638ac388c3628ed9e8image1.png"style="width:97px;height:26px;"/>/<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1590118465331aea12bee2f08492f8ea376e6d61acabeimage2.png"style="width:25px;height:22px;"/>

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标签：医学影像学专升本电子学基础电子学基础作业2

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