2022年恒定电流知识点总结复习课程 .pdf

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1、恒 定 电 流 知 识 点 总 结精品文档收集于网络，如有侵权请联系管理员删除恒定电流知识点总结一、知识网络二、知识归纳一、部分电路欧姆定律电功和电功率(一)部分电路欧姆定律电流：定义、微观式：I=q/t，I=nqSv 电压：定义、计算式：U=W/q，U=IR。导体产生电流的条件：导体两端存在电压电阻：定义、计算式：R=U/I，R=l/s。金属导体电阻值随温度升高而增实恒定电流部分电路：I=U/R闭合电路：I=E/(R+r)，或 E=U内+U外=IR+Ir 规电阻定律：R=l/s基欧姆定公式：W=qU=Iut纯电阻电路：电功等于电热电用电器总功率：P=UI，对纯电阻电路：P=UI=I2R=U2

2、/R 电源总功率：P总=EI 电源输出功率：P出=UI 电源损失功率：P损=I2r 电功伏安法测电阻：R=U/I，注意电阻的内、外接法对结果的影响描绘小灯泡的伏安特性文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6

3、HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O

4、1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6

5、HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O

6、1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6

7、HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O

8、1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1精品文档收集于网络，如有侵权请联系管理员删除1电流(1)电流的形成：电荷的定向移动就形成电流。形成电流的条件是：要有能自由移动的电荷；导体两端存在电压。(2)电流强度：通过导体横截面的电量q 跟

9、通过这些电量所用时间t 的比值电流强度的定义式为：电流强度的微观表达式为：n 为导体单位体积内的自由电荷数，q 是自由电荷电量，v 是自由电荷定向移动的速率，S是导体的横截面积。(3)电流的方向：物理学中规定正电荷的定向移动方向为电流的方向，与负电荷定向移动方向相反。在外电路中电流由高电势端流向低电势端，在电源内部由电源的负极流向正极2电阻定律(1)电阻：导体对电流的阻碍作用就叫电阻，数值上：。文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B

10、4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文

11、档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B

12、4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文

13、档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B

14、4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文

15、档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B

16、4N1X5I6 ZS2C5T1O1K1精品文档收集于网络，如有侵权请联系管理员删除(2)电阻定律：公式：，式中的为材料的电阻率，由导体的材料和温度决定。纯金属的电阻率随温度的升高而增大，某些半导体材料的电阻率随温度的升高而减小，某些合金的电阻率几乎不随温度的变化而变化。(3)半导体：导电性能介于导体和绝缘体之间，如锗、硅、砷化镓等。半导体的特性：光敏特性、热敏特性和掺杂特性，可以分别用于制光敏电阻、热敏电阻及晶体管等。(4)超导体：有些物体在温度降低到绝对零度附近时。电阻会突然减小到无法测量的程度，这种现象叫超导；发生超导现象的物体叫超导体，材料由正常状态转变为超导状态的温度叫做转变温度Tc。

17、3部分电路欧姆定律内容：导体中的电流跟它两端的电压成正比，跟它的电阻成反比。公式：适用范围：金属、电解液导电，但不适用于气体导电。欧姆定律只适用于纯电阻电路，而不适用于非纯电阻电路。文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q

18、5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6

19、ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q

20、5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6

21、ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q

22、5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6

23、ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1精品文档收集于网络，如有侵权请联系管理员删除伏安特性：描述导体的电压随电流怎样变化。若图线为过原点的直线，这样的元件叫线性元件；若图线为曲线叫非线性元件。(二)电功和电功率1电功

24、(1)实质：电流做功实际上就是电场力对电荷做功，电流做功的过程就是电荷的电势能转化为其他形式能的过程。(2)计算公式：适用于任何电路。只适用于纯电阻电路。2电功率(1)定义：单位时间内电流所做的功叫电功率。(2)计算公式：适用于任何电路。只适用于纯电阻电路。3焦耳定律文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:C

25、Y9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5

26、I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:C

27、Y9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5

28、I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:C

29、Y9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5

30、I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1精品文档收集于网络，如有侵权请联系管理员删除电流通过电阻时产生的热量与电流的平方成正比，与电

31、阻大小成正比，与通电时间成正比，即(三)电阻的串并联1电阻的串联电流强度：电 压：电 阻：电压分配：，功率分配：，2电阻的并联电流强度电 压电 阻电流分配，文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4

32、N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档

33、编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4

34、N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档

35、编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4

36、N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档

37、编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1精品文档收集于网络，如有侵权请联系管理员删除功率分配，注意：无论电阻怎样连接，每一段电路的总耗电功率P是等于各个电阻耗电功率之和，即P=P1+P2+Pn二、闭合电路欧姆定律(一)电动势电动势是描述电源把其

38、他形式的能转化为电能本领的物理量，例如一节干电池的电动势 E=1.5V，物理意义是指：电路闭合后，电流通过电源，每通过lC 的电荷，干电池就把1.5J的化学能转化为电能。(二)闭合电路的欧姆定律1闭合电路欧姆定律闭合电路中的电流跟电源的电动势成正比，跟内、外电路中的电阻之和成反比：。常用表达式还有：和2路端电压 U 随外电阻 R变化的讨论文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5

39、Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 Z

40、S2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5

41、Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 Z

42、S2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5

43、Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 Z

44、S2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1精品文档收集于网络，

45、如有侵权请联系管理员删除电源的电动势和内电阻是由电源本身决定的，不随外电路电阻的变化而改变，而电流、路端电压是随着外电路电阻的变化而改变的：(1)外电路的电阻增大时，I 减小，路端电压升高；(2)外电路断开时，R=。路端电压 U=E；(3)外电路短路时，R=0，U=0，(短路电流)短路电流由电源电动势和内阻共同决定由于 r 一般很小。短路电流往往很大，极易烧坏电源或线路而引起火灾。路端电压随外电阻变化的图线如图所示。3电源的输出功率随外电阻变化的讨论(1)电源的工作功率：，这个功率就是整个电路的耗电功率，通常叫做电源的供电功率。文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C

46、5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B

47、3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C

48、5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B

49、3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C

50、5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B3U6 HK6B4N1X5I6 ZS2C5T1O1K1文档编码:CY9Q5Y2B