作者love4351304 (雷斯纳多尔)
看板Physics
标题[题目] 金属球在介质中的电阻
时间Sun Apr 8 21:26:21 2012
[领域]普通物理 (题目相关领域)
[来源]上课讲义 (课本习题、考古题、参考书...)
[题目]
Two metal balls of the same radius a are located in a homogeneous poorly
conducting medium with resistivity k.Find the resistance of the medium
between the balls provided that the separation between them is much
greater than the radius of the ball.
[瓶颈] (写写自己的想法,方便大家为你解答)
这个题目好像没办法从R=k(l/A)下手
好像也无法从R=V/I算
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1F:推 mgtsai:使用点电荷镜像法,可以求出球形等电位面 04/09 19:20
2F:→ mgtsai:你的问题可以使用球形等电位面反推等效点电荷的位置 04/09 19:21
3F:→ mgtsai:接下来就直接求其电容值 (或本题的电阻值,经过适当的换算) 04/09 19:22