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电功率与安全用电

> 如图所示，合上开关S，发现灯不亮，用测电笔测试A、B、C、D各点，只在A点氖管发光，则故障是 A.BC之间断路 B.灯L断路 C.灯L短路 D.开关S接触不良

问题：

发布时间：2024-09-10

如图所示，合上开关S，发现灯不亮，用测电笔测试A、B、C、D各点，只在A点氖管发光，则故障是

A.BC之间断路
B.灯L断路
C.灯L短路
D.开关S接触不良

参考答案：

提问用户：90***lH3

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