问题描述：
谁知道初三物理电路初探的第一节最基本的概念啊?
要很形象哦,我比较苯,书上的概念看不懂!
例如:开关打开叫什么?关上叫什么?有什么作用?
问题关于:电源形象概念,开关形象概念,用电器形象概念
还有什么是短路,通路,断路<配图>
为什么电流没流过用电器就短路了?
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谢谢
要很形象哦,我比较苯,书上的概念看不懂!
例如:开关打开叫什么?关上叫什么?有什么作用?
问题关于:电源形象概念,开关形象概念,用电器形象概念
还有什么是短路,通路,断路<配图>
为什么电流没流过用电器就短路了?
```````````````````````````````
`````````````````````````````````
```````````````````````````````````
谢谢
问题解答：
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