题目内容
将正弦交流电经过整流器处理后,得到的电流波刚好去掉了半周,如图所示,则它的有效值是( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241207317262891.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241207317262891.jpg)
A.1.5 A | B.2.0 A | C.2.5 A | D.3.0 A |
A
设此电流的有效值为I,根据交流电有效值的定义有:(
)2R×
+0×
=I2RT,所以I="1.5" A.
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824120731726442.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824120731804406.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824120731804406.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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A.1.5 A | B.2.0 A | C.2.5 A | D.3.0 A |