作者legenthume (没有脚毛生不如死)
看板Physics
标题[题目] 电磁学问题
时间Wed Oct 26 20:29:19 2011
[领域] (题目相关领域)
电磁学
[来源] (课本习题、考古题、参考书...)
[题目]
Consider an object (not necessarily made of a conductor) that carries a
surface charge with density σ
(a) Show that the force acting on a small patch with area A on the surface is
F向量=
(Aε/2){[(Eabove)^2-(Ebelow)^2] ^n+2E平行分量(Eabove-Ebelow) ^t}
where ^n is the unit vector in the normal direction (pointing from below to
above),
while ^t a unit vector pointing along a direction tangent to the surface so
that
E平行分量 ^t=E-E垂直分量 ^n
(b) Find the electrostatic pressure acting on the surface charge.
[瓶颈] (写写自己的想法，方便大家为你解答)
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1F：推 j0958322080:写写自己的想法，方便大家为你解答 10/27 13:36