描述
电路中任意选择某一结点为参考结点,即作为零电位点,则其他结点与此参考结点之间的电压称为结点电压。结点法就是以结点电压为电路的独立变量来建立方程并求解此电路的一种分析方法。结点电压的参考极性均以零参考结点相联结,因此,支路电压就等于相关的两个结点的电压之差,或者说电路的全部支路电压均可以通过结点电压来表示。
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