题目内容
如图4,理想变压器原副线圈匝数之比为4∶1.原线圈接入一电压为u=U0sinωt的交流电源,副线圈
接一个R=27.5 Ω的负载电阻.若U0=220
V,ω=100π Hz,则下述
结论正确的是( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241220276873429.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/2014082412202757872.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824122027593224.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/2014082412202764072.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241220276873429.jpg)
A.副线圈中电压表的读数为55 V | |
B.副线圈中输出交流电的周期为![]() | |
C.原线圈中电流表的读数为0.5 A | D.原线圈中的输入功率为![]() |
AC
略
![](http://thumb2018.1010pic.com/images/loading.gif)
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