如图所示,
为热敏电阻(阻值随温度升高而减小),
和
均为定值电阻,电源电动势为
、内阻为
,电压表和电流表均为理想电表。如果
的温度降低,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/8/495f2e8a-f958-4abb-98f8-392796a6b5ca.png?resizew=231)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efc18a5bb2e53586331b2a58538a48b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f20f21a9d50b61dac519a3ddab539d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a2c4640b2bee411935f588fc5433c74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efc18a5bb2e53586331b2a58538a48b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/8/495f2e8a-f958-4abb-98f8-392796a6b5ca.png?resizew=231)
A.电压表示数增大,电流表示数减小 |
B.电压表、电流表示数均增大 |
C.电压表示数减小,电流表示数增大 |
D.电压表、电流表示数均减小 |
21-22高二下·重庆·期末 查看更多[8]
更新时间:2022-07-07 12:35:40
|
【知识点】 根据串反并同判断电阻电压和电流的变化