图中J1是可变电阻,测量箭头指向的1处 的阻值,并是不50K,如果J1的阻值变化,1处的阻值也变化,这是什么原因呢?
This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.