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電學
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郭俊偉
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Jun 8, 2013, 3:59:37 AM
6/8/13
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請問位啥面積要假設無限大?但一般電容面積很小的話要怎ㄇ處理?
討論區板主
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Jun 10, 2013, 11:43:57 AM
6/10/13
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您好:
因為如果是有限的話,就會有邊邊
板子的邊邊就不會是對稱的電場了
面積很小的話,高斯面就取接近於0(遠離邊邊),原本的小面積看起來也會像是無限大
重點是你取的那個位置,電場要對稱,才容易算
郭俊偉於 2013年6月8日星期六UTC+8下午3時59分37秒寫道:
請問位啥面積要假設無限大?但一般電容面積很小的話要怎ㄇ處理?
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