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Energy Storage Elements

Capacitance in Series and Parallel

Description

Capacitors in series and parallel affect a circuit in different ways. These arrangements change the total capacitance, which is the circuit's overall ability to store charge. Knowing the difference helps explain how a circuit responds to signals.

When capacitors are connected in series to a batte...

Transcript

电容器可以在电路中以串联和/或并联的方式连接。

考虑电容器与电池串联连接的情况;与电池正极相连的极板会带正电,而与负极相连的极板则会带负电。

在其他极板上会感应出等量的电荷,且相同的电流流经每个电容器。

将基尔霍夫电压定律应用于该回路,并代入每个电容器两端的电压,可得到等效电容器两端总电压的表达式,其中等效电容器的初始电压等于各电容器初始电压之和。

等效电容的倒数等于各个电容倒数之和。

现在,如果电容器并联连接,则每个电容器两端产生的电势差等于电池电压。

通过应用基尔霍夫电流定律,并将每个电容器的电流代入,可确定流经等效电容器的总电流。等效电容等于各个电容之和。

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