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51问答网 > 电路中接入大功率电炉后为什么灯泡会变暗

电路中接入大功率电炉后为什么灯泡会变暗

2025-03-16 17:01:01

推荐回答（2个）

回答1：

线路是有一定电阻的，接入大功率电炉会使线路中的电流加大，同时线路上的线损也就大了，造成的后果就是用电器的电压下降，电压下来了，灯就暗了。

回答2：

电线路的导线截面过小或过长，线阻偏大，在通过大的负载电流时，线损耗增大导致电压降增大，末端电压就偏低，电灯亮度变暗。

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