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58问答库 > 先接灯泡两根线，再端接带电两根线的时候,只接一根火线,零线还没有端接的时候，灯泡闪亮，为何?

先接灯泡两根线，再端接带电两根线的时候,只接一根火线,零线还没有端接的时候，灯泡闪亮，为何?

2025-04-07 05:31:29

推荐回答（2个）

回答（1）：

灯泡没接零线一段与零线间隔着空气相当于小一个电容，当接入火线时电容充电，灯丝相当于导线，瞬间导通闪亮，充满后由于电容量太小，交流电频率太低，容抗=1/2πfC,导致容抗太大，后续电流太小无法点亮灯泡。

回答（2）：

亮回访鞠鹊单杠着

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