断路无电流,电压表测得的就是电源电压 这句话对吗?为什么?举例?
问题描述:
断路无电流,电压表测得的就是电源电压 这句话对吗?为什么?举例?
答
`恩 `````````````
因为不可能是用电器啊·都已经断路了``````
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只能是电源了`````````