1/5单选题
难度：
1.实验室测导体电阻的方法叫（）
| A | 欧姆法 |
| B | 电阻法 |
| C | 伏安法 |
| D | 以上都不是 |
- 提示1：
- 5LyP5a6J5rOV5Y2z5rWL5Ye65a+85L2T55qE55S15Y6L5ZKM55S15rWB77yM5qC55o2uUj1VL0nlvpfliLDlr7zkvZPnmoTnlLXpmLs=
正确答案：Qw==
5LyP5a6J5rOV5Y2z5rWL5Ye65a+85L2T55qE55S15Y6L5ZKM55S15rWB77yM5qC55o2uUj1VL0nlvpfliLDlr7zkvZPnmoTnlLXpmLvvvIzmlYXpgIlDLg==
2/5单选题
难度：
2.利用电源、开关、导线及下列所给的器材不能测出未知电阻Rx的阻值的是（）
| A | 电压表、电流表、滑动变阻器 |
| B | 电压表、定值电阻R0 |
| C | 电流表、定值电阻R0 |
| D | 滑动变阻器、定值电阻R0 |
- 提示1：
- 55S15Y6L6KGo5ZKM55S15rWB6KGo6Iez5bCR6YCJ5LiA5Liq
正确答案：RA==
55S15Y6L6KGo5ZKM55S15rWB6KGo6Iez5bCR6YCJ5LiA5Liq77yM5omA5Lul5Y+q5pyJROmAiemhueS4reeahOWZqOadkOS4jeiDvea1i+WHuuacquefpeeUtemYu1I8c3ViPng8L3N1Yj7nmoTpmLvlgLzvvIzmlYXpgIlELg==
3/5单选题
难度：
3.在“测量小灯泡电阻”的实验中，滑动变阻器所起作用的说法不正确的是（ ）
| A | 改变电路中的电流 |
| B | 保护电路 |
| C | 改变被测小灯泡的电阻 |
| D | 改变被测小灯泡两端的电压 |
- 提示1：
- 5ruR5Yqo5Y+Y6Zi75Zmo55qE5L2c55So77ya5L+d5oqk55S16Lev77yM6LCD6IqC55S15Y6L5ZKM55S15rWB
正确答案：Qw==
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
4/5单选题
难度：
4.在“伏安法”测电阻的实验中，下列注意事项中不正确的是（ ）
| A | 连接电路时，开关应断开 |
| B | 在无法估计被测电压、电流的大小时，可用试触法选取合适的量程 |
| C | 将变阻器连入电路时，滑片应放到使电路中电流最小的位置 |
| D | 测出一组电压、电流的值后，计算得到待测电阻的值 |
- 提示1：
- 54mp55CG5a6e6aqM5bqU5aSa5qyh5rWL6YeP5b6X5Yiw5aSa57uE5pWw5o2u5Lul5L+d6K+B5a6e6aqM57uT5p6c55qE5YeG56Gu5oCn
正确答案：RA==
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
5/5单选题
难度：
5.某同学在没有电流表的情况下，利用电压表和已知阻值的定值电阻R0，测量未知电阻Rx阻值，下图中不能测出Rx阻值的电路图是（）
| A |  |
| B |  |
| C |  |
| D |  |
- 提示1：
- 5YCf5YqpUjxzdWI+MDwvc3ViPuaxguWHuueUtei3r+S4reeahOeUtea1gQ==
正确答案：Qg==
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