This following applet is [b] Sharp edge has higher Charge density (electric field)[/b]
Created by prof Hwang Modified by Ahmed
orginal project  [url=http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=462.0]Sharp edge has higher Charge density (electric field)[/url]

The electric field on the metal surface is perpendicular to the surface, and it's strength is proportional to the surface charge density.

This applets try to demonstrate why the charge density is higher at the sharp edge.
Charge repel each other, however, there are free to move along the metal surface.
(Charge density is higher at the sharp edge, do not imply there are more charges. )

You can use mouse to drag the right slider up and down to change the shape of the ellipse.

/htdocs/ntnujava/ejsuser/37048/users/br/ahmed/sharpellipsecharge_pkg/sharpellipsecharge.propertiesFull screen applet or Problem viewing java?Add http://www.phy.ntnu.edu.tw/ to exception site list
Press the Alt key and the left mouse button to drag the applet off the browser and onto the desktop. This work is licensed under a Creative Commons Attribution 2.5 Taiwan License
Download EJS jar file(1457.4kB):double click downloaded file to run it. (28 times by 15 users) , Download EJS source (5 times by 5 users) View EJS source