中学生网络课堂本课配套习题挑战模式1/5
多选题
难度系数：
1.
如果将两个定值电阻R1和R2 以某种形式连接起来接入电路中，则电阻R1消耗的功率为12 W，R2消耗的电功率为P2；若将它们以另一种形式连接起来接入原电路中，测得该电路的总电流为9 A，此时电阻R1消耗的电功率为108 W，R2消耗的电功率为P2′；则下列有关说法正确的是（ ）
| A: 定值电阻R1的阻值为3Ω |
| B: P2′ 与P2之比是9∶4 |
| C: 定值电阻R1的阻值为6Ω |
| D: 电源两端的电压是4V |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5Zug5Li656ys5LqM5qyhUjxzdWI+MTwvc3ViPua2iOiAl+WKn+eOh+Wkp+S6juesrOS4gOasoVI8c3ViPjE8L3N1Yj7mtojogJflip/njofvvIzmiYDku6XnrKzkuozmrKFSPHN1Yj4xPC9zdWI+5Lik56uv55qE55S15Y6L5aSn77yM5Lmf5bCx5piv6K+056ys5LiA5qyh5Lik55S16Zi75piv5Liy6IGU55qE77yM56ys5LqM5qyh5piv5bm26IGU55qEPC9wPg==
- 提示2：PHA+5ZCM5LiA55S16Zi75raI6ICX55qE5Yqf546H5LiO55S15Y6L55qE5bmz5pa55oiQ5q2j5q+UPC9wPg==
- 提示3：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
- 答案：QSxC
PGRpdj48aW1nIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMjMvOTkvckJBQ0UxTU1iejZ4MUo2ckFBQXdyeko2RWZzNzkyLnBuZyIgZGF0YS1ja2Utc2F2ZWQtc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8yMy85OS9yQkFDRTFNTWJ6NngxSjZyQUFBd3J6SjZFZnM3OTIucG5nIiBoZWlnaHQ9IjM1OCIgd2lkdGg9IjM2MyI+PC9kaXY+
本课配套习题挑战模式2/5
多选题
难度系数：
2.
如图所示电路中，电源两端电压保持18V不变，小灯泡L上标有“6V,3W”字样，定值电阻R1 =10Ω，滑动变阻器最大电阻值R2 =50Ω. 不考虑灯丝电阻随温度的变化，下列说法正确的是（ ）
| A: 开关S断开时，电压表的示数为18V |
| B: 电路接通后，小灯泡L的最小实际电功率为0.75W |
| C: 电压表的示数减少1V，电阻R1两端的电压就增加1V |
| D: 小灯泡L正常发光时，变阻器R2消耗的电功率为3.5W |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5b2T5byA5YWz5pat5byA55qE5pe25YCZ77yM55S15Y6L6KGo5rWL5b6X5piv55S15rqQ55S15Y6LLjwvcD4=
- 提示2：PHA+5b2T55S16Lev5o6l6YCa5ZCO77yM55S15Y6L6KGo5rWL5b6X5piv54Gv5rOh5ZKM5a6a5YC855S16Zi75Lik56uv55qE55S15Y6L77yM6KaB6K6h566X54Gv5rOh55qE5pyA5bCP5Yqf546H77yM55Sx5LqO54Gv5rOh55qE55S16Zi75LiA5a6a77yM5Y+q6KaB6K6h566X5Ye655S16Lev5Lit55qE5pyA5bCP55S15rWB5Y2z5Y+v77yM55Sx5qyn5aeG5a6a5b6L55+l6YGT77yM55S16Lev5Lit55qE5pyA5bCP55S15rWB77yM5Y2z55S16Zi75pyA5aSn5pe25YCZ77yM5pWF5ruR5Yqo5Y+Y6Zi75Zmo5YWo5o6l5YWl55S16Lev5pe255S16Lev5Lit55qE55S16Zi75pyA5aSnPC9wPg==
- 提示3：PHA+5Liy6IGU55S16Lev5Lit5ZCE55So55S15Zmo5Lik56uv55qE55S15Y6L5LmL5ZKM562J5LqO55S15rqQ55S15Y6L77yM55S15Y6L6KGo55qE56S65pWw5YeP5bCRMVbvvIzmu5Hliqjlj5jpmLvlmajkuKTnq6/nmoTnlLXljovlupTlop7liqAxVi48L3A+
- 提示4：PHA+5bCP54Gv5rOh5q2j5bi45Y+R5YWJ5pe277yM55u45b2T5LqO55+l6YGT55S16Lev5Lit55qE55S15rWB77yM5qC55o2u55S16Zi75YC877yM5Y+v6K6h566X5Ye65a6a5YC855S16Zi75ZKM54Gv5rOh5Lik56uv55qE55S15Y6L77yM6K6p55S15rqQ55S15Y6L5YeP5Y6754Gv5rOh5Lik56uv55qE55S15Y6L77yM5Y2z5Y+v5rGC5Ye65ruR5Yqo5Y+Y6Zi75Zmo5Lik56uv55qE55S15Y6L77yM5qC55o2uUD1VSeWNs+WPr+axguWHuuWKn+eOhy48L3A+
- 答案：QSxCLEQ=
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
本课配套习题挑战模式3/5
多选题
难度系数：
3.
如图10所示电路，电源两端电压不变，设灯的电阻不随温度变化。当开关S1、S2都闭合时，灯L正常发光，R1消耗的功率为18W，当开关S1、S2都断开时，灯L的功率为其额定功率的1/9，R1消耗的功率为2W，则下列说法正确的是（ ）
| A: R1=2R2 |
| B: 灯L的额定功率为18W |
| C: 2RL= R1+ R2 |
| D: 只闭合S1时，电路消耗功率为36W |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5b2T5byA5YWzUzxzdWI+MTwvc3ViPuOAgVM8c3ViPjI8L3N1Yj7pg73pl63lkIjml7bvvIxSPHN1Yj4xPC9zdWI+44CBUjxzdWI+Mjwvc3ViPuWSjOeBr+azoeW5tuiBlO+8jOW9k+W8gOWFs1M8c3ViPjE8L3N1Yj7jgIFTPHN1Yj4yPC9zdWI+6YO95pat5byA5pe277yMUjxzdWI+MTwvc3ViPuOAgVI8c3ViPjI8L3N1Yj7lkoznga/ms6HkuLLogZTjgII8YnI+PC9wPg==
- 提示2：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
- 提示3：PHA+5qC55o2u5LiJ5Liq55So55S15Zmo55S16Zi75YWz57O75Yik5pat5a6D5Lus55qE5Yqf546H5YWz57O7PGJyPjwvcD4=
- 答案：QixD
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
本课配套习题挑战模式4/5
单选题
难度系数：
4.如图所示电路中，电源两端电压U保持不变，电阻 Rl阻值为 30Ω。当开关 S1、S2都断开与都闭合时，电压表示数之比为 3∶8，电阻 R2消耗的功率之比为 1∶4 ，电阻R3消耗的最小功率为 0.9W。下列判断正确的是（ ）
| A: 开关 S1、S2都闭合时，电路消耗的总功率P＝91.2W |
| B: 开关 S1、S2都闭合时，电流表的示数 I＝1.6A |
| C: 电源两端电压U＝12V |
| D: 电阻R3＝40Ω |
一次做对，真牛！
+5奖励规则>
- 提示1：IOW9k+W8gOWFs1M8c3ViPjE8L3N1Yj7jgIFTPHN1Yj4yPC9zdWI+6YO95pat5byA5pe277yM5LiJ55S16Zi75Liy6IGU77yM55S15Y6L6KGo5rWLUjxzdWI+MTwvc3ViPuS4pOerr+eahOeUteWOi++8jOeUtemYu1I8c3ViPjM8L3N1Yj7mtojogJfnmoTlip/njofmnIDlsI/vvJvlvZPlvIDlhbNTPHN1Yj4xPC9zdWI+44CBUzxzdWI+Mjwvc3ViPumDvemXreWQiOaXtu+8jOS4ieeUtemYu+W5tuiBlO+8jOeUteWOi+ihqOa1i+eUtea6kOeahOeUteWOi++8jOeUtea1geihqOa1i1I8c3ViPjE8L3N1Yj7lkoxSPHN1Yj4yPC9zdWI+5pSv6Lev55qE55S15rWB5LmL5ZKMLg==
- 提示2：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
- 提示3：IOagueaNrlA9PGltZyB3aWR0aD0xMyBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8wMC9BOS9yQkFDRkZNTWIwU0NScVdBQUFBQlYxMkFHVVE1NTEucG5nIj7ooajnpLrlh7rlm74y5LiJ55S16Zi755qE55S15Yqf546H77yM5LiJ6ICF5LmL5ZKM5Y2z5Li655S16Lev5raI6ICX55qE5oC75Yqf546H77yb5qC55o2u5bm26IGU55S16Lev55qE54m554K55ZKM5qyn5aeG5a6a5b6L5rGC5Ye65Zu+MuS4reeUtea1geihqOeahOekuuaVsC4gPGltZyB3aWR0aD0yMTAgaGVpZ2h0PTEzNCBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzIzLzk5L3JCQUNFMU1NYjBmelBSRjJBQUFmR21RODNzazkxOS5wbmciPg==
- 答案：QQ==
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
本课配套习题挑战模式5/5
多选题
难度系数：
5.
如图所示电路，电源两端电压U保持不变，闭合开关S. 当开关S1闭合时，电路消耗的电功率为P，电压表V1、V2的示数分别为U1和U2；开关S1断开时，电路消耗的电功率为P'，电压表V1、V2的示数分 别为U'1和U'2，电阻R3消耗的电功率为6W. 已知电阻R1=2Ω，U1：U'1=3：2，U2：U'2=15：16. 则下列判断正确的是（ ）
| A: R3= |
| B:
|
| C:
|
| D:
|
，
，
，
，
一次做对，真牛！
+5奖励规则>
- 提示1：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
- 答案：QSxD
PGRpdj48aW1nIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMjMvOTkvckJBQ0UxTU1iMHJBZ0dnWEFBQnJSR1pFRS1nNTkxLnBuZyIgZGF0YS1ja2Utc2F2ZWQtc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8yMy85OS9yQkFDRTFNTWIwckFnR2dYQUFCclJHWkVFLWc1OTEucG5nIiBoZWlnaHQ9IjYwMiIgd2lkdGg9IjQ0NSI+PC9kaXY+
