查看“︁電流分配定則”︁的源代码

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'''電流分配定則'''（{{lang-en|Current divider rule}}），是指在[[並聯電路]]中，各負載分到的電流之間的關係。

;對於電壓源電路
:電源電壓為各負載的電壓降
::<math>V_e = V_1 = V_2 = \cdots = V_n</math>
:各阻抗流經的電流
::<math>I_n = \frac{V_n}{Z_n}</math>
:總電流
::<math>I_\mathrm{total} =\sum_{k=1}^n {I}_k = I_1 + I_2 + \cdots + I_n</math>
:總阻抗
::<math>Z_\mathrm{total} = \frac{V_e}{I_\mathrm{total}}</math>

;對於電流源電路
:總電流
::<math>I_\mathrm{total} =\sum_{k=1}^n {I}_k = I_1 + I_2 + \cdots + I_n</math>
:總阻抗
::<math>\frac{1}{Z_\mathrm{total}} = \frac{1}{Z_1} + \frac{1}{Z_2} + \cdots + \frac{1}{Z_n}</math>
:各分路電流
::<math>I_\mathrm{n} = \frac{Z_\mathrm{total}}{Z_n} \cdot I_\mathrm{total}</math>

;在只有2個電阻的並聯電路裡，相關計算公式可以簡化為：
:總電阻
::<math>R_\mathrm{total} = \frac{R_1 \cdot R_2}{R_1+R_2}</math>
:各分路電流
::<math>I_1 = \frac{R_2}{R_1+R_2} \cdot I_\mathrm{total}</math>
::<math>I_2 = \frac{R_1}{R_1+R_2} \cdot I_\mathrm{total}</math>

==相關==
*[[電壓分配定則]]

==外部連結==
*[https://web.archive.org/web/20070227223015/http://utwired.engr.utexas.edu/rgd1/lesson05.cfm University of Texas: Notes on electronic circuit theory]

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[[Category:電流]]
[[Category:電路分析|C]]
[[Category:電子元件|C]]
[[Category:電子學術語|C]]