题目内容
一交流电压随时间变化的规律如图所示,该交流电压的有
效值和周期分别是
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241228418344172.png)
效值和周期分别是
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241228418344172.png)
A.14.14V,0.0ls | B.l0V,0.0ls | C.14.14V,0.02s | D.l0V,0.02s |
C
根据凸显可知,交流电的最大值为14.14V,所以交流电的有效值为U=
=10V,根据图象可知,交流电的周期为0.02s,所以C正确.
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824122841865528.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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