中学生网络课堂本课配套习题挑战模式1/5
单选题
难度系数：
1.
如图所示，定值电阻R1的阻值18Ω，滑动变阻器R2的最大阻值为150Ω，电源电压为18V，电流表选择0～0.6A量程，电压表的量程为0～15V．为了保证电路各元件安全，滑动变阻器R2的阻值变化范围为（ ）
| A: 0Ω～150Ω |
| B: 20Ω～100Ω |
| C: 12Ω～90Ω |
| D: 20Ω～90Ω |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5qC55o2u55S15rWB6KGo55qE5pyA5aSn55S15rWB77yM5rGC5Ye65YW25a6e55qE5oC755S16Zi777yM54S25ZCO5rGC5Ye65ruR5Yqo5Y+Y6Zi75Zmo55qE5pyA5bCP6Zi75YC8PGJyPjwvcD4=
- 提示2：PHA+5qC55o2u55S15Y6L6KGo55qE5pyA5aSn5YC877yM5rGC5Ye65ruR5Yqo5Y+Y6Zi75Zmo5q2k5pe25o6l5YWl55S16Lev55qE5pyA5aSn6Zi75YC8PGJyPjwvcD4=
- 答案：Qw==
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本课配套习题挑战模式2/5
单选题
难度系数：
2.
如图所示，电源电压12V保持不变，小灯泡电阻为6Ω，允许的最大电流为1A。电流表的量程是0～0.6A，滑动变阻器的规格0~50Ω，为了保证电路各元件都能安全使用，则滑动变阻器连入电路的阻值范围是（ ）
| A: 15Ω～50Ω |
| B: 18Ω～50Ω |
| C: 0Ω～14Ω |
| D: 14Ω～50Ω |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5Liy6IGU55S16Lev5YiG5Y6LPC9wPg==
- 提示2：PHA+55S15rWB6KGo5YWB6K646YCa6L+H55qE5pyA5aSn55S15rWB5Li6MC42Qe+8jOWImea7keWKqOeUtemYu+WZqOaOpeWFpeeUtei3r+W6lOivpeacieS4gOS4quacgOWwj+WAvDwvcD4=
- 答案：RA==
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
本课配套习题挑战模式3/5
单选题
难度系数：
3.
如图所示的电路中，电源电压为4.5V不变，电阻R1标有“6Ω，0.5A”，滑动变阻器R2标有“30Ω，1A”，电流表量程为“0～0.6A”，电压表量程为“0～3V”. 为了保护各电表和元件，滑动变阻器R2允许接入电路的阻值范围是（ ）
| A: 0～12Ω |
| B: 0～30Ω |
| C: 3～12Ω |
| D: 3～30Ω |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5b2T55S15Y6L6KGo6L6+6L6+5pyA5aSn5YC85pe277yM5ruR5Yqo5Y+Y6Zi75Zmo5o6l5YWl5pyA5aSn5YC8PC9wPg==
- 提示2：PHA+5b2T55S16Lev5Lit55S15rWB6L6+5YWB6K6455qE5pyA5aSn5YC85pe277yM5ruR5Yqo5Y+Y6Zi75Zmo5o6l5YWl5pyA5bCP5YC8PC9wPg==
- 答案：Qw==
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
本课配套习题挑战模式4/5
单选题
难度系数：
4.
如图所示电路，电源电压保持不变，当闭合开关S，调节滑动变阻器阻值从最大变化到最小，两个电阻的“U-I”关系图象如图所示. 则下列判断正确的是（ ）
| A: 电源电压为10V |
| B: 定值电阻R1的阻值为20Ω |
| C: 滑动变阻器 R2 的阻值变化范围为0～10Ω |
| D: 变阻器滑片在中点时，电流表示数为0.3A |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5ruR5Yqo5Y+Y6Zi75Zmo55Sx5pyA5aSn5YC85Y+Y5Li65pyA5bCP5YC877yM5YiZ5YW25Lik56uv55qE55S15Y6L5Lmf55Sx5pyA5aSn5YC85Y+Y5Li65pyA5bCP5YC877yM5Y2z55Sy5Li65ruR5Yqo5Y+Y6Zi75Zmo55qE4oCcVS1J4oCd5YWz57O75Zu+5YOPPC9wPg==
- 提示2：PHA+5LmZ5Li655S16Zi7UjxzdWI+MTwvc3ViPueahOKAnFUtSeKAneWFs+ezu+WbvuWDjzwvcD4=
- 提示3：PHA+6YCJ5Y+W55u45bqU55qE5YC877yM5qC55o2uVT1SSeiuoeeulzwvcD4=
- 答案：RA==
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
本课配套习题挑战模式5/5
单选题
难度系数：
5.
如图所示的电路中，电源电压U=4.5V，且保持不变，电阻R1=5Ω，变阻器R2的最大阻值为20Ω，电流表量程为0～0.6A，电压表量程为0～3V. 该电路中，变阻器接入电路的阻值范围是（ ）
| A: 2.5Ω～10Ω |
| B: OΩ～20Ω |
| C: 2.5Ω～20Ω |
| D: 0Ω～10Ω |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5Liy6IGU5YiG5Y6LPC9wPg==
- 提示2：PHA+55S15rWB6KGo5pyA5aSn5pe277yM5YWB6K645o6l5YWl55qE55S16Zi75YC85pyA5bCPPC9wPg==
- 提示3：PHA+55S15Y6L6KGo5pyA5aSn5pe277yM5YWB6K645o6l5YWl5YWl55qE55S16Zi75YC85pyA5aSnPGJyPjwvcD4=
- 答案：QQ==
PGRpdj7lvZPnlLXmtYHooajmnIDlpKflgLzml7bvvIznlLXot6/nlLXmtYHkuLowLjZB77yM55S15rqQ55S15Y6L5Li6NC41Vu+8jOWImeeUtei3r+eUtemYu+S4ujcuNc6p77yM5a6a5YC855S16Zi75aSn5bCP5Li6Nc6p77yM5YiZ5ruR5Yqo5Y+Y6Zi75Zmo5o6l5YWl55S16Lev55qE6Zi75YC85Li6Mi41zqnvvJvlvZPnlLXljovooajovr7liLDmnIDlpKflgLzml7bvvIzlpKflsI/kuLozVu+8jOWImeWumuWAvOeUtemYu+WIhuW+l+eUteWOi+S4ujEuNVbvvIznlLXpmLvlpKflsI/kuLo1zqnvvIzliJnnlLXmtYHlpKflsI/kuLowLjNB77yM5ruR5Yqo5Y+Y6Zi75Zmo6Zi75YC85Li6MTDOqTwvZGl2Pg==
