题目内容
如图所示,某小型发电站发电机输出的交流电压为500 V,输出的电功率为50 kW,用电阻为3 Ω的输电线向远处送电,要求输电线上损失功率为输电功率的0.6%,则发电站要安装一升压变压器,到达用户再用降压变压器变为220 V供用户使用(两个变压器均为理想变压器).对整个送电过程,下列说法正确的是 ( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250053242593744.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250053242593744.jpg)
A.输电线上的损失功率为300 W |
B.升压变压器的匝数比为1∶100 |
C.输电线上的电流为10 A |
D.降压变压器的输入电压为4970 V |
ACD
试题分析:根据
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825005324274868.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825005324306515.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825005324321914.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825005324337946.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825005324368941.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825005324384756.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250053243991073.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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