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电容器连在电路中相当于什么
更新时间: 2020-07-14 00:00:00  

电容器在直流电路中,两端电压小于击穿电压,相当于断路,两端电压大于击穿电压,电路导通;电容器在交流电路中,电路导通,两个极板可以储存电荷,加压相当于充电,外电路在不电压的情况下放电,此时电压是充电前电路两端的电压,注意电容器的正负极:和电源正极相接的是电容器的正极,放电时正极板相当于电源正极,电流流出,和电容器串联的电阻中电流方向相反。

关键词: 电容器 电路 相当 什么

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