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恒定电流 (复习) PowerPoint PPT Presentation


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恒定电流 (复习). 知识结构. 电流强度 I. 电压 U. 电阻 R. 电源电动势 E. 电功率 P. 电热 Q. 电功 W. 电阻定律. 部分电路欧姆定律. 闭合电路欧姆定律. 焦耳定律. 串联特点、性质. 并联特点、性质. 测定金属电阻率. 测定电池的电动势和内电阻. 使用多用电表. 基本概念. 基本规律. 电路连接. 实验. 电阻的串联和并联. 1. U . R. I . 电压分配. 电流分配. R. 并联. 串联. 各电阻 I 1 = I 2 = . 各支路 U 1 = U 2 = .

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恒定电流 (复习)

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I

U

R

E

P

Q

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1

U

R

I

R

I1=I2=

U1=U2=

U=U1+U2+

I= I1+I2+

R=R1+R2+

12 (3)


1

W (Kw)


2

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3

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    C A1V1A2V2

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    a

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    A

    B

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    U(v)

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    ( )

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    26 R 1.3=2R2.4 R 1.2=3R2.4 R 1.4 =2R 2.4 ;R 3.4 =0

    1

    3

    2

    4


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