å¾å°±ç¨ä½ çå¾
åä¸ä¸ªä¸åæ±ä½åè½´çåæ±å½¢é«æ¯é¢,åå¾ä¸ºr,é¿åº¦ä¸ºd.ç±äºæ¯æ éé¿åå带çµåæ±å½¢å£³å±,éè¿ä¸¤åºé¢ççµéé为é¶,æ以åªåæéè¿ä¾§é¢ççµéé.1ãåå¾å°äºbæ¶,E*2Ï rd=q/ε,q=0,æ以E=0. 2ãåå¾å¤§äºbæ¶,E*2Ï rd=q/ε=Ï2Ï rd/ε,æ以E=Ïb/εr.
追é®![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/3c6d55fbb2fb4316794e524c26a4462309f7d3b6?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/3c6d55fbb2fb4316794e524c26a4462309f7d3b6?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
è¿æ ·åå¯ä»¥å