[理工] [電磁]
如果一個半徑為D的金屬球殼
表面電荷密度為 a*cosθ(a是常數)
求總電荷Q
想問的是 作球座標的面積分時
是對 dR dθ dΦ 哪個作積分??
如果有對dΦ積分的話
積分時乘上Rsinθ
那總電荷就等於0了
是這樣嗎??
小弟電磁很弱
請高手救救我 謝謝!!
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◆ From: 114.25.250.168
※ 編輯: dytjbs 來自: 114.25.250.168 (02/13 18:40)
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