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白炽灯分正负极吗
更新时间: 2020-09-19 00:00:00  

白炽灯在不同的情况下分正负极,在以下情况下正负极的分法:

1、家用的普通灯泡是交流供电的,不分正负极性的;

2、车上用的灯泡是直流供电的,全部要分正负极性;

3、所有的直流电都要分正负极性的,和电压高低无关。

关键词: 白炽灯 负极

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