Author Topic: Sharp edge has higher Charge density (electric field)  (Read 37457 times)

Fu-Kwun Hwang

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Sharp edge has higher Charge density (electric field)
« on: April 10, 2007, 11:30:04 pm »
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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.


Registed user can get files related to this applet for offline access.
Problem viewing java?Add http://www.phy.ntnu.edu.tw/ to exception site list
If java program did not show up, please download and install latest Java RUN TIME