【简答题】![](https://cos-cdn.shuashuati.com/shuashuati-web/2024-0521-0905-00/logo-new-ad743.png)
在测电阻的实验中,待测电阻 Rx大约为20Ω,从实验室找出以下供选择的器材:(要求电压从0开始调节,测量数据尽可能精确) A电池组(电动势3 V,内阻约1Ω) B电流表A 1(0~150 mA,内阻 Rg 1约5Ω) C.电压表V(0~3 V,内阻5kΩ) D电压表V(0~15 V,内阻10 kΩ) E滑动变阻器 R 1(0~20Ω) F滑动变阻器 R 2(0~3 000Ω) G开关、导线若干 (1)实验时应从上述器材中选用____________(填写仪器前字母代号). (2)将设计的电路图画在下面虚线框内.
(3)根据电路原理图完成下列实物图连接。
![](https://cdn.shuashuati.com/imgs/2005fef469f60c84cae40305aa0300f5.png)
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACAAAAAgCAYAAABzenr0AAAA5ElEQVRYR2NkGGDAOMD2M+B0wKpVq9huv/jbxPD/fxwDA4MkhQ59zsDIuEhVgrkuLCzsF7JZOB3QOml5B8P//+UUWoyqnZGxszovsoI4B0xc9gyfzxmZmb2rcsK3IRvWMWm599///7fgcfTz6vwoKWId8B+f75kZGX0q8iK3kugAhur8KJRQxx0FE5fhdQC5UTPqgNEQGA2B0RAYDYHREBgNgaETAuTW96TqG7yt4tbRFhGRIQBqHTP9+8dIoDUMTxqk5AK8zXKYiaDWMYhNpANIaJYPdMdkwLtmpOZnctUPeDkAAP6tmiH1ggTLAAAAAElFTkSuQmCC)
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参考答案:
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参考解析:
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