题目内容
如图所示,理想变压器的原、副线圈匝数之比为10︰1,R1=20W,R2=10W,C为电容器,原线圈所加电压
(V)。下列说法正确的是
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241217358223057.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824121735712607.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241217358223057.jpg)
A.通过电阻R3的电流始终为零 |
B.副线圈两端交变电压的频率为50 Hz |
C.电阻R2的电功率为48.4W |
D.原、副线圈铁芯中磁通量变化率之比为10︰1 |
BC
略
![](http://thumb2018.1010pic.com/images/loading.gif)
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