[問題] 電場和電流傳播速度
以下有兩個問題
1.電流速度到底多快
2.電場也有傳撥速度嘛
EX:有距離很遠的A B兩點
A點有一個正電荷,突然將他改變
在B點由A所建立的場會瞬間改變嘛
如果不是 速度又是多少
謝謝
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