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.关于电功，下列说法正确的是（ ）
| A: 电流通过电灯做功时，电能只转化为光能 |
| B: 电流做功的多少可能大于电能转化为其他形式能量的多少 |
| C: 通过导体的电流越大，电流做的功一定越多 |
| D: 电流做了多少功，就相当于有多少形式的电能转化为其他形式的能 |
一次做对，真牛！
+5奖励规则>
- 提示1：IOWBmuWKn+aAu+aYr+S8tOmaj+edgOiDvemHj+eahOi9rOWMlu+8jOeUteWKn+S5n+S4jeS+i+Wkli4g55So55S15Zmo5raI6ICX5LqG55S16IO977yM6I635b6X5LqG5YW25a6D5b2i5byP55qE6IO96YeP77yM5bCx5piv5LiA5Liq55S15rWB5YGa5Yqf55qE6L+H56iLLg==
- 答案：RA==
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
本课配套习题挑战模式2/5
单选题
难度系数：
2.关于电功和电热的计算，下列说法正确的是（ ）
| A: 如果是纯电阻电路，电功可用公式W=UIt计算，也可用公式W=I2Rt计算 |
| B: 如果是纯电阻电路，电热可用公式W=I2Rt计算，但不能用公式W=UIt计算 |
| C: 如果不是纯电阻电路，电功只能用公式W=I2Rt计算 |
| D: 如果不是纯电阻电路，电热可用公式W=I2Rt计算，也可用公式W=UIt计算 |
一次做对，真牛！
+5奖励规则>
- 提示1：IOe6r+eUtemYu+eUtei3r++8jOeUteWKn+WPr+eUqOWFrOW8j1c9VUl06K6h566X77yM5Lmf5Y+v55So5YWs5byPVz1JPHN1cD4yPC9zdXA+UnTorqHnrpfvvIzpnZ7nuq/nlLXpmLvnlLXot6/vvIznlLXlip/nlKjlhazlvI9XPVVJdOiuoeeul++8jOeUteeDreeUqOWFrOW8j1c9STxzdXA+Mjwvc3VwPlJ06K6h566X
- 答案：QQ==
PGRpdj5B44CB57qv55S16Zi755S16Lev77yM5qC55o2u6IO96YeP5a6I5oGS55S15Yqf5ZKM55S154Ot55S155u4562J77yM55S15Yqf5Y+v55So5YWs5byPVz1VSXTorqHnrpfvvIzkuZ/lj6/nlKjlhazlvI9XPUk8c3VwPjI8L3N1cD5SdOiuoeeul++8jOaVhUHmraPnoa48YnI+QuOAgeWQjOeQhuWPr+efpULplJnor688L2Rpdj48ZGl2PkPjgIHpnZ7nuq/nlLXpmLvnlLXot6/vvIznlLXlip/nlKjlhazlvI9XPVVJdOiuoeeul++8jOaVhUPplJnor688YnI+ROOAgemdnue6r+eUtemYu+eUtei3r++8jOeUteeDreeUqOWFrOW8j1c9STxzdXA+Mjwvc3VwPlJ06K6h566XLiDmlYVE6ZSZ6K+vPGJyPuaVhemAiUE8L2Rpdj4=
本课配套习题挑战模式3/5
单选题
难度系数：
3.
如图所示，R1的电阻为20Ω，当开关S闭合后电流表A的示数为0.3A，电流表A1的示数为0.1A. 求通电5分钟R2所消耗的电能（ ）
| A: 60J |
| B: 30J |
| C: 90J |
| D: 120J |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5qC55o2u5bm26IGU55S16Lev55qE55S15Y6L54m554K55ZKM5qyn5aeG5a6a5b6L5rGC5Ye655S16Zi7UjxzdWI+Mjwvc3ViPueahOeUtemYu+WAvDxicj48L3A+
- 提示2：PHA+5qC55o2uVz1VSXTmsYLlh7rpgJrnlLU15YiG6ZKfUjxzdWI+Mjwvc3ViPuaJgOa2iOiAl+eahOeUteiDvTxicj48L3A+
- 答案：RA==
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
本课配套习题挑战模式4/5
单选题
难度系数：
4.
如图所示的电路中，电源电压为6伏特，当开关S闭合时，电流表的示数为0.5安培，如果电阻R2的阻值为6欧姆，求通电10秒钟整个电路消耗的电能
| A: 30J |
| B: 60J |
| C: 90J |
| D: 120J |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5b2T5byA5YWzU+mXreWQiOaXtu+8jOS4pOeUtemYu+W5tuiBlO+8jOeUtea1geihqOa1i1I8c3ViPjE8L3N1Yj7mlK/ot6/nmoTnlLXmtYHvvIzmoLnmja7lubbogZTnlLXot6/nmoTnlLXmtYHnibnngrnlkozmrKflp4blrprlvovmsYLlh7rpgJrov4fnlLXpmLtSPHN1Yj4yPC9zdWI+55qE55S15rWB77ybPC9wPg==
- 提示2：PHA+5qC55o2u5bm26IGU55S16Lev55qE55S15rWB54m554K55rGC5Ye65bmy6Lev55S15rWB77yM55S15rqQ55S15Y6L5Li6NlY8L3A+
- 提示3：PHA+5qC55o2u5YWs5byPVz1VSXTlj6/msYLpgJrnlLUxMOenkuaVtOS4queUtei3r+a2iOiAl+eahOeUteiDvTwvcD4=
- 答案：Qw==
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
本课配套习题挑战模式5/5
单选题
难度系数：
5.
如图所示电路，电源电压为12伏，电阻R1的阻值为10欧，滑动变阻器R2标有“100Ω，2A”字样，当电键S闭合时，电流表A的示数为0.2安. 且此时电压表、电流表的量程选择都合适. 求：通电10秒钟，R2消耗的电能
| A: 5J |
| B: 10J |
| C: 18J |
| D: 20J |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+55S15Y6L6KGoVjxzdWI+MTwvc3ViPueahOa1i+mHj+eUtemYu1I8c3ViPjE8L3N1Yj7kuKTnq6/nmoTnlLXljovvvIzlt7Lnn6XnlLXpmLvlkozpgJrov4fnmoTnlLXmtYHnmoTlpKflsI/vvIzmoLnmja7lhazlvI9VPUlS5Y+v5rGC55S16Zi75Lik56uv55qE55S15Y6L77ybPC9wPg==
- 提示2：PHA+5qC55o2u5Liy6IGU55S16Lev55S15Y6L55qE54m554K577yM5Y+v5rGCUjxzdWI+Mjwvc3ViPuS4pOerr+eahOeUteWOi++8jOagueaNruWFrOW8j1c9VUl05Y+v5rGC5raI6ICX55qE55S16IO9PC9wPg==
- 答案：RA==
PGRpdj48aW1nIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMDEvRDUvckJBQ0ZGTU5WR2J6TmFxWUFBQWlIV2lRemhnMzMyLnBuZyIgZGF0YS1ja2Utc2F2ZWQtc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8wMS9ENS9yQkFDRkZNTlZHYnpOYXFZQUFBaUhXaVF6aGczMzIucG5nIiBoZWlnaHQ9IjExNyIgd2lkdGg9IjUwOSI+PC9kaXY+
