题目内容
(8分)如图所示电路中,电源的电动势E=6V,内阻r=0.6Ω,电阻R1=6W,R2=4W。则:
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250018419984549.png)
(1)图中a, b哪个是电流表?哪个是电压表?
(2)闭合电键S后a、b的两个电表的示数。
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250018419984549.png)
(1)图中a, b哪个是电流表?哪个是电压表?
(2)闭合电键S后a、b的两个电表的示数。
(1)a是电流表,b是电压表 (2)a的示数是2A,b的示数是4.8V
试题分析:(1)根据电压表和电流表的使用要求可知a是电流表,b是电压表
(2)根据电路图可知:外电路电阻
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250018420141171.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250018420301090.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250018420611010.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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