作者Asce (Excalibur)
看板Physics
标题Re: [题目] 静电学
时间Tue Oct 7 23:27:10 2008
※ 引述《Asce (Excalibur)》之铭言：
: [来源]Introduction to Electrodynamics/David J. Griffiths
: [题目]:Find the net force that the southern hemisphere of
: a uniformly chargerd sphere exerts on the northern
: hemisphere. (Total charge:Q、Radius:R)
首先以高斯定律求出球体内各点的电场值，再乘一小块体积
的带电来做积分，但方向的问题我不知道怎麽解决......
解答是3Q^2K/16R^2.
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