中学生网络课堂本课配套习题挑战模式1/5
下列计算热量的公式中，哪一个是焦耳定律的普遍适用公式（ ）
| A:
|
| B:
|
| C:
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| D: 三个都普遍使用 |
- 提示1：PHA+54Sm6ICz5a6a5b6L6K6y6L+w5LqG55S16IO96L2s5YyW5Li65YaF6IO977yM5Lmf5bCx5piv55S15rWB5Lqn55Sf54Ot6YeP5pe255qE5pyJ5YWz6KeE5b6LLiDlroPnmoTlhazlvI/mmK9RPUk8c3VwPjI8L3N1cD5SdDwvcD4=
- 答案：Qw==
PGRpdj7nlLXmtYHpgJrov4flr7zkvZPkuqfnlJ/nmoTng63ph4/kuI7nlLXmtYHnmoTkuozmrKHmlrnmiJDmraPmr5TvvIzkuI7lr7zkvZPnmoTnlLXpmLvmiJDmraPmr5TvvIzkuI7pgJrnlLXml7bpl7TmiJDmraPmr5QuPGJyPueUqOWFrOW8j+ihqOekuuaYr++8mlE9STxzdXA+Mjwvc3VwPlJ0LiDmraTlhazlvI/mmK/orqHnrpfnlLXng63nmoTmma7pgY3kvb/nlKjlhazlvI/vvIzml6Dorrrlr7nnuq/nlLXpmLvnlLXot6/miJbpnZ7nuq/nlLXpmLvnlLXot6/mnaXor7TnrpfnlLXng63pg73pgILnlKguJm5ic3A7PGJyPuaVhemAiUM8L2Rpdj4=
本课配套习题挑战模式2/5
电阻R和电动机M相串连接到电路中，如图所示. 已知电阻R跟电动机线圈的电阻相等，开关接通后，电动机正常工作. 设电阻R和电动机两端的电压分别为U1和U2；经过时间t，电流通过电阻R做功W1，产生的电热为Q1；电流通过电动机M做功W2，产生的电热为Q2，则有（ ）
| A: U1＜U2，Q1=Q2 |
| B: W1>W2，Q1=Q2 |
| C: W1＜W2，Q1＜Q2 |
| D: W1＜W2，Q1=Q2 |
- 提示1：PHA+57qv55S16Zi755S16LevOiDnlLXlip8955S154OtPC9wPg==
- 提示2：PHA+6Z2e57qv55S16Zi755S16Lev77ya55S15YqfJmd0O+eUteeDrTwvcD4=
- 答案：QSxE
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
本课配套习题挑战模式3/5
下列关于电功、电功率和焦耳定律的说法中正确的是（ ）
| A: 电功率越大，电流做功越快，电路中产生的热量一定越多 |
| B: W=UIt适用于任何电路，而W=I2Rt= |
| C: 在不是纯电阻的电路中，W＞Q |
| D: 焦耳定律Q=I2Rt适用于任何电路 |
只适用于纯电阻的电路- 提示1：PHA+55S15Yqf5piv6KGo56S655S15rWB5YGa5Yqf55qE5aSa5bCR77yM55S15Yqf546H5piv6KGo56S655S15rWB5YGa5Yqf55qE5b+r5oWi77yM54Sm6ICz5a6a5b6L5piv6KGo56S655S15rWB5Lqn55Sf55qE54Ot6YeP55qE5aSa5bCRLjxicj48L3A+
- 提示2：PHA+6Z2e57qv55S16Zi755S16Lev5Lit77yM55S15Yqf5aSn5LqO55S154OtPGJyPjwvcD4=
- 答案：QixDLEQ=
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
本课配套习题挑战模式4/5
如图所示，电源电压为24V电路保持不变，小灯泡的规格为“24V，12W”，电流表的示数为5.5A，已知：电动机的电阻为0.5Ω 。则在相同时间内，电动机消耗的电能和产生电热的比值W：Q的值为（ ）
| A: 43:2 |
| B: 48:5 |
| C: 8:3 |
| D: 1:1 |
- 提示1：PHA+54Sm6ICz5a6a5b6LUT1JPHN1cD4yPC9zdXA+UnTvvIzlj6/msYLlh7rnlLXliqjmnLrkuqfnlJ/nmoTng63ph488L3A+
- 提示2：PHA+55S15Yqo5py655qE55S15Yqf77y3PVVJdDwvcD4=
- 答案：Qg==
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
本课配套习题挑战模式5/5
如图所示，电动机的电阻为0.5Ω ，定值电阻的阻值为200Ω，电源电压为220V。相同时间内，电动机消耗的电能和电阻消耗的电能之比为10:1，则电动机在1分钟内产生的热量为（ ）
| A: 2460J |
| B: 3630J |
| C: 6300J |
| D: 3600J |
- 提示1：PHA+6YCa6L+H55S16Zi755S15rWBMS4xQTwvcD4=
- 提示2：PHA+55S15Yqo5py65raI6ICX55qE55S16IO95ZKM55S16Zi75raI6ICX55qE55S16IO95LmL5q+U5Li6MTA6Me+8jOmAmui/h+eUteWKqOacuueUtea1geS4ujExQeOAgjwvcD4=
- 提示3：PHA+55Sx54Sm6ICz5a6a5b6L5Y+v5rGC5Ye65Lqn55Sf55qE54Ot6YePPC9wPg==
- 答案：Qg==
PGRpdj7lubbogZTnlLXot6/lkITmlK/ot6/nlLXljovnm7jnrYnvvIzlt7Lnn6XlrprlgLznlLXpmLvnlLXljotVPTIyMFbvvIznlLXpmLtSPTIwMM6p77yM5Y+v5rGC5b6X6YCa6L+H5a6a5YC855S16Zi755qE55S15rWB562J5LqOMS4xQe+8jOeUteWKqOacuua2iOiAl+eahOeUteiDveWSjOeUtemYu+a2iOiAl+eahOeUteiDveS5i+avlOS4ujEwOjHvvIzmoLnmja7nlLXog73mr5TnrYnkuo7nlLXmtYHmr5Tlj6/nn6XnlLXliqjmnLrnlLXmtYHkuLoxMUHvvIznlLXliqjmnLrkuqfnlJ/nmoTng63ph49RPUk8c3VwPjI8L3N1cD5SdD3vvIgxMUHvvIk8c3VwPjI8L3N1cD54MC41zql4NjBzPTM2MzBKPC9kaXY+
