[請益] 電位
b
V(r) = -∫ E。dl , E和dl都是向量
∞
︿ ︿ ︿
l是由無限遠指向電荷的向量,E= kq/r r 是由電荷指向外的向量,所以l = -r
可是我看課本上做積分都沒有考慮E。dl的正負號,但用上面的邏輯想,他應該要是負值阿
到底我哪裡觀念有錯阿,卡了好久...
謝謝!!
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 114.45.172.211
推
03/20 18:20, , 1F
03/20 18:20, 1F
→
03/20 18:21, , 2F
03/20 18:21, 2F
→
03/20 18:21, , 3F
03/20 18:21, 3F
→
03/20 18:22, , 4F
03/20 18:22, 4F
→
03/20 18:22, , 5F
03/20 18:22, 5F
推
03/20 19:00, , 6F
03/20 19:00, 6F
→
03/20 19:00, , 7F
03/20 19:00, 7F
推
03/20 19:31, , 8F
03/20 19:31, 8F
→
03/20 22:55, , 9F
03/20 22:55, 9F
→
03/20 22:55, , 10F
03/20 22:55, 10F
討論串 (同標題文章)