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1 . 如图甲所示为某同学组装完成的简易多用电表的电路图。图中,
为定值电阻,
为欧姆调零电阻;表头G的满偏电流为
,内阻为
。虚线圆框内为选择开关,A端和B端分别与两表笔相连。该多用电表有5个挡位,5个挡位为:直流电流
挡,
是电源,分别对应欧姆
、
、
挡,直流电压
挡。
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/23/3d22b8b1-854b-49a1-9bd1-364d879a5d7b.png?resizew=609)
(1)图中的A端与___________ (填“红”或“黑”)色表笔相连接;
(2)根据题给条件可得![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8225d0531fba46cbb4a3af4dd2d6751f.png)
___________
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9da2bffd131ba5acc159bedadb1eee54.png)
___________
;
(3)某次测量选择开关选择
挡时发现多用电表指针偏角过大。换挡重新欧姆调零之后,指针位置如图乙所示,此时多用电表读数为___________
;
(4)根据图乙中的信息,可以得出
的电动势为___________ V。
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d76d49d2e59345a02ed9f6181c47f625.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be9b4a83b9aebebf29de0c4406ebf894.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53b5550ee9fe6e73278c3fdb95320059.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d23e4e7c92b7064ed50bcccc42d7770.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8265201bce13a51a204ff4ff77230a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2138e70564492deb4947372b66d600ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3a1e976dc7ccea4600a8ad1121760.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d55519bd96aba05e6f1533ddc7bb63fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db1312eb38e4229b59867b4bcdbbb7eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b26d0e154ef213ebe194b8b5e519f13.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/23/3d22b8b1-854b-49a1-9bd1-364d879a5d7b.png?resizew=609)
(1)图中的A端与
(2)根据题给条件可得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8225d0531fba46cbb4a3af4dd2d6751f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0047f659c182291c84c224df6b5e993f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9da2bffd131ba5acc159bedadb1eee54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0047f659c182291c84c224df6b5e993f.png)
(3)某次测量选择开关选择
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da590d880c7d901a072a1366914ab408.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0047f659c182291c84c224df6b5e993f.png)
(4)根据图乙中的信息,可以得出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b4dbe5d5c8b9c28c6f5eb92278a9f17.png)
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