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2019年中考物理试题专题训练——电功率计算专题(word版含答案).pdf

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1、学习资料收集于网络，仅供参考学习资料2019年中考物理专题训练电功率计算专题1.（2019 巴彦淖尔，12）如图所示是某温控装置的简化电路图，工作电路由电压为220V 的电源和阻值R88的电热丝组成；控制电路由电源、电磁铁（线圈电阻R020）、开关、滑动变阻器R2（取值范围080）和热敏电阻R1组成；R1阻值随温度变化的关系如下表所示，当控制电路电流I50mA 时，衔铁被吸合切断工作电路；当控制电路电流I40mA 时，衔铁被释放接通工作电路。（1）工作电路正常工作时，R 在 1min 内产生的热量是多少？（2）当温度为60，滑动变阻器R2 50时，衔铁恰好被吸合，控制电路的电源电压是多少？（3

2、）若控制电路电源电压不变，此装置可控制的温度最大范围是多少？（4）要想要该装置所控制的最高温度降低一些，请分析说明如何改变R2的阻值。学习资料收集于网络，仅供参考学习资料2.（2019 通辽，25）有一台热水器，内部简化电路如图所示，R1和 R2均为电热丝。R1=88，R2=22。（1）如何控制S1和 S2，使热水器处于高温挡；（2）求低温挡正常工作5min 电热丝产生的热量；（3）求中温挡正常工作时热水器的功率。3.（2019 黔东南，21）如图所示的电路，电源电压保持不变，R130，R210当闭合开关 S1、S，断开 S2时，电流表的示数为0.4A。（1）求电源电压；（2）当闭合开关S2、

3、S，断开 S1时，求电流表的示数；（3）当闭合开关S1、S2、S时，通电100s，求整个电路消耗的电能。文档编码:CF3I7M1C8G9 HS5V8A2T8P9 ZY5V3V7Y7H9文档编码:CF3I7M1C8G9 HS5V8A2T8P9 ZY5V3V7Y7H9文档编码:CF3I7M1C8G9 HS5V8A2T8P9 ZY5V3V7Y7H9文档编码:CF3I7M1C8G9 HS5V8A2T8P9 ZY5V3V7Y7H9文档编码:CF3I7M1C8G9 HS5V8A2T8P9 ZY5V3V7Y7H9文档编码:CF3I7M1C8G9 HS5V8A2T8P9 ZY5V3V7Y7H9文档编码:CF3

4、I7M1C8G9 HS5V8A2T8P9 ZY5V3V7Y7H9文档编码:CF3I7M1C8G9 HS5V8A2T8P9 ZY5V3V7Y7H9文档编码:CF3I7M1C8G9 HS5V8A2T8P9 ZY5V3V7Y7H9文档编码:CF3I7M1C8G9 HS5V8A2T8P9 ZY5V3V7Y7H9文档编码:CF3I7M1C8G9 HS5V8A2T8P9 ZY5V3V7Y7H9文档编码:CF3I7M1C8G9 HS5V8A2T8P9 ZY5V3V7Y7H9文档编码:CF3I7M1C8G9 HS5V8A2T8P9 ZY5V3V7Y7H9文档编码:CF3I7M1C8G9 HS5V8A2T8P9

5、 ZY5V3V7Y7H9文档编码:CF3I7M1C8G9 HS5V8A2T8P9 ZY5V3V7Y7H9文档编码:CF3I7M1C8G9 HS5V8A2T8P9 ZY5V3V7Y7H9文档编码:CF3I7M1C8G9 HS5V8A2T8P9 ZY5V3V7Y7H9文档编码:CF3I7M1C8G9 HS5V8A2T8P9 ZY5V3V7Y7H9文档编码:CF3I7M1C8G9 HS5V8A2T8P9 ZY5V3V7Y7H9文档编码:CF3I7M1C8G9 HS5V8A2T8P9 ZY5V3V7Y7H9文档编码:CF3I7M1C8G9 HS5V8A2T8P9 ZY5V3V7Y7H9文档编码:CF3

6、I7M1C8G9 HS5V8A2T8P9 ZY5V3V7Y7H9文档编码:CF3I7M1C8G9 HS5V8A2T8P9 ZY5V3V7Y7H9文档编码:CF3I7M1C8G9 HS5V8A2T8P9 ZY5V3V7Y7H9文档编码:CF3I7M1C8G9 HS5V8A2T8P9 ZY5V3V7Y7H9文档编码:CF3I7M1C8G9 HS5V8A2T8P9 ZY5V3V7Y7H9文档编码:CF3I7M1C8G9 HS5V8A2T8P9 ZY5V3V7Y7H9文档编码:CF3I7M1C8G9 HS5V8A2T8P9 ZY5V3V7Y7H9文档编码:CF3I7M1C8G9 HS5V8A2T8P9

7、 ZY5V3V7Y7H9文档编码:CF3I7M1C8G9 HS5V8A2T8P9 ZY5V3V7Y7H9文档编码:CF3I7M1C8G9 HS5V8A2T8P9 ZY5V3V7Y7H9文档编码:CF3I7M1C8G9 HS5V8A2T8P9 ZY5V3V7Y7H9文档编码:CF3I7M1C8G9 HS5V8A2T8P9 ZY5V3V7Y7H9文档编码:CF3I7M1C8G9 HS5V8A2T8P9 ZY5V3V7Y7H9文档编码:CF3I7M1C8G9 HS5V8A2T8P9 ZY5V3V7Y7H9文档编码:CF3I7M1C8G9 HS5V8A2T8P9 ZY5V3V7Y7H9文档编码:CF3

8、I7M1C8G9 HS5V8A2T8P9 ZY5V3V7Y7H9文档编码:CF3I7M1C8G9 HS5V8A2T8P9 ZY5V3V7Y7H9文档编码:CF3I7M1C8G9 HS5V8A2T8P9 ZY5V3V7Y7H9文档编码:CF3I7M1C8G9 HS5V8A2T8P9 ZY5V3V7Y7H9文档编码:CF3I7M1C8G9 HS5V8A2T8P9 ZY5V3V7Y7H9文档编码:CF3I7M1C8G9 HS5V8A2T8P9 ZY5V3V7Y7H9文档编码:CF3I7M1C8G9 HS5V8A2T8P9 ZY5V3V7Y7H9文档编码:CF3I7M1C8G9 HS5V8A2T8P9

9、 ZY5V3V7Y7H9文档编码:CF3I7M1C8G9 HS5V8A2T8P9 ZY5V3V7Y7H9文档编码:CF3I7M1C8G9 HS5V8A2T8P9 ZY5V3V7Y7H9文档编码:CF3I7M1C8G9 HS5V8A2T8P9 ZY5V3V7Y7H9文档编码:CF3I7M1C8G9 HS5V8A2T8P9 ZY5V3V7Y7H9学习资料收集于网络，仅供参考学习资料4.（2019辽阳，27）图甲是两档空气炸锅，图乙是其内部简化电路，R1、R2均为发热体，将开关 S分别置于 1、2 两位置时，空气炸锅处于不同的档位，已知两档空气炸锅的高温档功率为 900W，R2阻值为 96.8，求：

10、（1）发热体R1的阻值是多少？（2）空气炸锅一次性可装入200g牛柳，若将这些牛柳从40加热到190，牛柳需要吸收多少热量？c牛柳=3103J/(kg）（3）不计热量损失，用高温档将200g牛柳从 40加热到190，需要多长时间？文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9

11、HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10

12、G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7

13、 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4

14、X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z1

15、0文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:

16、CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E

17、9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10学习资料收集于网络，仅供参考学习资料5.（2019 湘潭，32）如图 1 所示为某实验室的自动除湿器，除湿器中的压缩机是整个系统的核心，除湿器的动力，全部由压缩机来提供。除湿器内部的电路结构由控制电路和工作电路两部分组成，简化后的电路图如图2 所示。控制电路中的电源电压U1 12V，调控电咀R0的阻值范围为01000，R 为装在除湿器内的湿敏电阻，其阻值随相对湿度（空气中含有水蒸气的百分比，单位为：%RH）变化的图象如图2 所示，L 为磁控开关，当湿敏电阻R的阻值发生变化时，控制电路中线圈的电流随之发生变化，当电流大于或等于20mA

18、时，L的两个磁性弹片相互吸合，工作电路的压缩机开始带动系统进行除湿。工作电路两端电220V，Rg为保护电阻，磁控开关L 的线圈电阻不计。问：（1）压缩机工作过程中内部的电动机主要把电能转化成能；当 S接通时，可判断出图 2 中线圈上端P 的磁极是极。（2）由图3 可知，湿敏电阻R 的阻值随着相对湿度的增加而变；若实验室内部的相对湿度为60%RH，此时湿敏电阻R 的阻值为。（3）因实验室內有较敏感的器件，要求相对湿度控制在45%RH 以内，则调控电阻R0的阻值不能超过多少？（4）若除湿过程中工作电路的总功率为1100W，工作电路的电流为多少？已知保护电阻Rg2，如果除湿器工作时磁控开关L 的磁

19、性弹片有一半的时间是闭合的，则1h 内 Rg消耗的电能是多少？文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9

20、HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10

21、G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7

22、 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4

23、X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z1

24、0文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:

25、CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10学习资料收集于网络，仅供参考学习资料6.（2019 山西，23）“创新”小组的同学们调查发现，雨雪天气里汽

26、车后视镜会变模糊，影响行车安全。同学们设计了给后视镜除雾、除霜的加热电路。如图是加热电路原理图，电源电压 100V，加热电阻R1与 R2阻值均为100，电路低温挡除雾，高温挡除霜。同学们对电路进行模拟测试，开启除霜模式加热后视镜1min，用温度传感器测得其温度升高了6求：（1）除霜模式下，电路中的电流；（2）除霜模式下，电路的加热效率。查资料得：视镜玻璃质量约0.5kg，玻璃的比热容约0.8103/（kg?）7.（2019 齐齐哈尔，30）如图甲是文文同学家新买的一台冷暖空调扇，其内部简化电路如图文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG

27、5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B

28、8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS

29、1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6

30、U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 Z

31、L5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3

32、H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文

33、档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10学习资料收集于网络，仅供参考学习资料乙所示，R1、R2均为发热电阻，R1的阻值为110，M 是电动机。开关S1闭合后，当S2接 1、2 时吹冷风；当 S2接 2、3 时吹温风；当 S2接 3、4 时吹热风，此时空调扇的总功率为1100W 已知：电源电压为220V，c

34、冰2.1103J/（kg?）。求：（1）吹冷风时，在空调扇内加入冰袋会使吹出的风温度变低，若冰袋内冰的质量为lkg，温度从 16升高到一6时，冰从周围吸收的热量是多少？（2）吹冷风时，电动机正常工作1h 消耗的电能为0.11kW?h，此时通过电动机的电流是多少？（3）吹热风时，R2的电阻是多少？8.（2019攀枝花，33）某科技小组探究如图甲所示电路中的滑动变阻器R 的电功率P 与电流表 A 的示数 I 之间的变化关系，得到 P 与 I 之间的关系如图乙所示。图甲中 R0为定值电阻，电源电压不变。求：文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:

35、CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E

36、9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9

37、HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10

38、G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7

39、 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4

40、X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z1

41、0文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10学习资料收集于网络，仅供参考学习资料（1）滑动变阻器R 消耗的最大功率为多少；（2）滑动变阻器R 的阻值为多大时，滑动变阻器R 消耗的功率最大；（3）滑动变阻器R 两端电压UR与电流表示数I 的关系式。9.（2019 贵阳，28）如图所示电路，电源电压恒为8V，

42、小灯泡标有“6V 3W”字样。若不考虑温度对灯泡电阻的影响，闭合开关S，求：（1）小灯泡的额定电流；（2）小灯泡正常发光时，滑动变阻器R接入电路的阻值。（3）移动滑动变阻器的滑片，当电压表示数为3V 时，小灯泡的实际功率。文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M

43、10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8

44、Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5

45、R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9

46、Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编

47、码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K

48、3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H

49、9 HS1M10G6U8Q7 ZL5R4X3H9Z10学习资料收集于网络，仅供参考学习资料10(2019宁夏,17)小明家中的电热水水壶坏了，他在网上查到两种外形基本相同的电热水壶的铭牌如图表11 所示：（1）用品牌2 的电热水壶烧开一壶水用时6 分钟，则电热水壶消耗了多少电能？（2）小明认为“品牌1”这款电热水壶功率小，更省电。从节能的角度考虑，你认为他的这种想法合理吗？为什么？11.(2019北京，34)如图所示的电路中，电源两端电压保持不变，电阻丝 R1 的阻值为10 当开关 S闭合后，电压表的示数为2V，电流表的示数为0.4A求：（1）通电 10s电阻丝 R1 产生的热量；（2）电源两

50、端的电压。文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文档编码:CG5K3E9B8H9 HS1M10G6U8Q7 ZL5R4X3H9Z10文

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关键词：: 2019 年中物理试题专题训练电功率计算 word 答案

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本文标题：2019年中考物理试题专题训练——电功率计算专题(word版含答案).pdf
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