1/5单选题
难度：
1.
关于安阻法测电阻，下列说法正确的是（ ）
| A | 在安阻法测电阻中：必须把未知电阻和已知电阻并联 |
| B | 在安阻法测电阻中：必须把未知电阻和已知电阻串联 |
| C | 在安阻法测电阻中，必须有两块电流表 |
| D | 安阻法测电阻实验中，可以把未知电阻和已知电阻串联。 |
- 提示1：
- PHA+5oqK5pyq55+l55S16Zi75ZKM5bey55+l55S16Zi75bm26IGU77yM5Y+v5Lul6YCa6L+H5bm26IGU5pe25ZCE5pSv6Lev55S15Y6L55u4562J77yM6K6h566X5Ye65pyq55+l55S16Zi76Zi75YC844CCPC9wPg==
- 提示2：
- PHA+5oqK5pyq55+l55S16Zi75ZKM5bey55+l55S16Zi75Liy6IGU77yM5Y+v5Lul6YCa6L+H55+t6Lev5YW25Lit5LiA5Liq55S16Zi755qE5pa55rOV77yM5rWL5Ye65Lik5qyh55qE55S15rWB77yM5YaN5Yip55So55S15rqQ55S15Y6L5LiN5Y+Y77yM6K6h566X5Ye65pyq55+l55S16Zi744CCPC9wPg==
正确答案：RA==
PGRpdj7lronpmLvms5XmtYvnlLXpmLvlj6/ku6XmmK/ljZXlronms5XvvIzkuZ/lj6/ku6XmmK/lj4zlronms5XvvJvnlLXot6/ml6Llj6/ku6XkuLLogZTkuZ/lj6/ku6XlubbogZTjgILmiYDku6XmraPnoa7nrZTmoYjkuLpEPC9kaXY+
2/5单选题
难度：
2.
小明想利用一块电流表和阻值已知的电阻R0测量未知电阻RX的阻值。他连接了部分实验电路，下列电路中补全导线正确的是（ ）
| A |
|
| B |
|
| C |
|
| D |
|
- 提示1：
- PHA+5Y2V5a6J5rOV5rWL55S16Zi75pyJ5LiA5Liq5byA5YWz55+t6Lev5p+Q5LiA55S16Zi777yM55S16Lev5b+F5Li65Liy6IGUPGJyPjwvcD4=
- 提示2：
- PHA+5Lik5Liq5byA5YWz5pyJ5LiA5Liq5o6n5Yi255S16Lev55qE6YCa5patPC9wPg==
- 提示3：
- 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
正确答案：RA==
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
3/5单选题
难度：
3.
为了测某未知电阻阻值，某同学设计了如下电路。闭合开关S1，断开S2，读出电流表的示数为I1； 同时闭合开关S1、S2，读出电流表的示数为I2；用I1、I2和R0表示RX，则RX 的值为（ ）
| A |
|
| B |
|
| C |
|
| D |
|
- 提示1：
- PHA+5Y+q6Zet5ZCIUzxzdWI+MTwvc3ViPuaXtu+8jFI8c3ViPng8L3N1Yj7kuI5SPHN1Yj4wPC9zdWI+5Liy6IGU77yM55S15rWB6KGo55qE55S15rWBSTxzdWI+MTwvc3ViPj1VL++8iFI8c3ViPng8L3N1Yj4rUjxzdWI+MDwvc3ViPu+8iTxicj48L3A+
- 提示2：
- PHA+Jm5ic3A75ZCM5pe26Zet5ZCIUzxzdWI+MTwvc3ViPuOAgVM8c3ViPjI8L3N1Yj4sUjxzdWI+MDwvc3ViPuiiq+efrei3r++8jEk8c3ViPjI8L3N1Yj49VS9SPHN1Yj54PC9zdWI+PC9wPg==
- 提示3：
- PHA+55SxSTxzdWI+MTwvc3ViPu+8iCBSPHN1Yj54PC9zdWI+K1I8c3ViPjA8L3N1Yj7vvIk9IEk8c3ViPjI8L3N1Yj4gUjxzdWI+eCA8L3N1Yj48c3ViPu+8jDwvc3ViPuWPr+W+l1I8c3ViPng8L3N1Yj49STxzdWI+MTwvc3ViPlI8c3ViPjA8L3N1Yj4vKEk8c3ViPjE8L3N1Yj4tSTxzdWI+Mjwvc3ViPik8L3A+
正确答案：Qg==
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
4/5多选题
难度：
4.
小乐利用两块电流表和阻值已知的电阻R0测量电阻Rx的阻值。电路没有连接完整，下列连接中正确的是（ ）
| A |
|
| B |
|
| C |
|
| D |
|
- 提示1：
- PHA+5Y+v5Lul6K6p55S15rWB6KGoQTxzdWI+MTwvc3ViPua1i+W5sui3rzxicj48L3A+
- 提示2：
- PHA+5Y+v5Lul6K6p55S15rWB6KGoQTxzdWI+MTwvc3ViPua1i+mAmui/h1J455qE55S15rWBPGJyPjwvcD4=
正确答案：QSxC
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
5/5单选题
难度：
5.如图所示，是用电流表A、单刀双掷开关S、电阻箱R'和已知电阻R0来测量未知电阻Rx阻值的电路图现将开关S拨到a，此时电流表的示数为I；再将开关S拨到b，调节电阻箱R'的阻值. 当电流表的示数为0.5I时，电阻箱的阻值为R，则被测电阻Rx的阻值为（ ）
| A |  |
| B | R0 |
| C |  |
| D |  |
- 提示1：
- IOeUtea6kOeUteWOi+S4jeWPmA==
- 提示2：
- IOWwhuW8gOWFs1Pmi6jliLBh77yMVT1J77yIUngrUjxzdWI+MDwvc3ViPu+8ie+8jOWGjeWwhuW8gOWFs1Pmi6jliLBi77yMVT0wLjVJ77yIUicrUjxzdWI+MDwvc3ViPu+8iQ==
正确答案：Qw==
PGRpdj7lsIblvIDlhbNT5ouo5YiwYe+8jFU9Se+8iFJ4K1I8c3ViPjA8L3N1Yj7vvInvvIzlho3lsIblvIDlhbNT5ouo5YiwYu+8jFU9MC41Se+8iFInK1I8c3ViPjA8L3N1Yj7vvInvvIzkuozogIXnm7jnrYnvvIzliJnmnIlSPTxpbWcgd2lkdGg9MzAgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMDAvOTAvckJBQ0ZGTU1aMnJSb0tmLUFBQUJvd2dfdldvODE3LnBuZyI+PC9kaXY+