题目内容
如图所示,理想变压器原、副线圈的匝数比是10∶1,原线圈输入交变电压
(V),在副线圈中串接有理想电流表和定值电阻R,电容器并联在电阻R两端,电阻阻值R="10" Ω,关于电路分析,下列说法中正确的是
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241535069752172.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824153506897865.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241535069752172.png)
A.电流表示数是1 A |
B.电流表示数是![]() |
C.电阻R消耗的电功率为10 W |
D.电容器的耐压值至少是![]() |
CD
试题分析:输入电压的有效值为110V,由
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824153507209636.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824153507272757.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824153507100439.png)
点评:难度较小,本题难点在于忽略电容器通交流隔直流的特点
![](http://thumb2018.1010pic.com/images/loading.gif)
练习册系列答案
相关题目