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電學
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郭俊偉
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Jun 4, 2013, 1:18:32 PM
6/4/13
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電場0=>力是0=>不做功=>等電位
1.老師取的高斯面是"表面再裡面一點點",所以金屬的表面是在"高斯面外",而上述說的等電位,是指高斯面包住的空間(因為"高斯面包住的空間"電場0)請問跟"金屬表面"等電位有啥關係?
討論區板主
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Jun 10, 2013, 11:39:15 AM
6/10/13
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您好:
這邊的推導已經需要用到微分方程了
概念上來說是因為金屬表面是等電位,給定了邊界條件,所以可以確定只有唯一一個解,而電場為0可以符合方程式,所以電場為0就是那個唯一的解
如果有興趣的話,您可以在網路上查一下靜電場跟柏松方程
Poisson's equation
或是找大學的電磁學課本來看
郭俊偉於 2013年6月5日星期三UTC+8上午1時18分32秒寫道:
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