作者wamos (豆腐普洱汤)
看板Physics
标题[题目]普物一题
时间Sun Mar 28 02:51:50 2010
[领域] 普物
[来源] BENSON
[题目]
A nonconducting infinite plate has a surface charge density
σ on each face. It is placeed parallel to a similar plate with
-σ on each face. What is the field (a)in the region between the
plates?(b)within the positive plate?
我的答案是
σ σ
(a) -------- (b)--------
εo 2εo
可是解答给
2σ σ
(a)------- (b)-------
εo εo
满奇怪的阿!!
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1F：→ chungweitw:两侧都 sigma, 不就 2 sigma? 不怪 03/28 02:56
2F：→ wamos:可以解释一下吗 ? 03/28 13:56
3F：推 Mpegwmvavi:注意看题目写的,他的带电面有两面,并不是无穷薄的带电 03/28 14:38
4F：→ Mpegwmvavi:板,所以你可以看做有四层无穷带电板 03/28 14:39
5F：→ wamos:谢M大 我懂了!! 03/28 15:41