課程名稱︰普通物理學甲下
課程性質︰數學系大一必帶
課程教師︰黃暉理
開課學院：理學院
開課系所︰數學系
考試日期（年月日）︰2014/04/15
考試時限（分鐘）：120
試題 :
1. A small circular hole of radius R has been cut in the middle of an infinite,
flat, non-conducting surface that has uniform charge density σ. A Z axis,
with its origin at the hole's center, is perpendicular to the surface. In
unitvector notation, what is the electric field at point P at height z?
https://i.imgur.com/2UyDscK.png
\begin{tikzpicture}
\filldraw[gray] (4.5, 1.5)