题目内容
将R=200Ω的电阻接入下图所示的电流电路中,电源内阻不计,则可判断
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241331591775541.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241331591775541.png)
A.此交流电的频率为50HZ |
B.此交流电压的有效值为311V |
C.若串联一理想电流表测该电路的电流,读数为1.1A |
D.在一个周期内电阻R上产生的热量是4.84J |
ACD
周期为0.02s,频率f=1/T=50Hz,由
,A对B错,电流表测量的是电流的有效值,为U/R=1.1A,![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824133159239751.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824133159208837.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824133159239751.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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