题目内容
将R="200" Ω的电阻接入如图所示的交流电路中,电源内阻不计,则可判断( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241207337852574.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241207337852574.jpg)
A.此交流电的有效值为![]() |
B.此交流电的频率为100 Hz |
C.线圈在磁场中转动的角速度为100 rad/s |
D.在一个周期内电阻R上产生的热量是4.84 J |
D
由图象可知Um="311" V,T="0.02" s,所以U有=
="220" V,f=
="50" Hz,ω=
="100" π rad/s,A、B、C错.内阻R产生的热量
×0.02 J="4.84" J,D正确.
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824120733816601.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824120733832348.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824120733848508.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824120733894983.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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