Thursday, September 10, 2015

electromagnetism - Surface charge in a wire?


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The image above shows the distribution of the surface charge in a current carrying wire. The surface charges distributes themselves to make sure the field inside the wire is always perpendicular to the surface of the wire.


Why is exactly half of the wire covered in negative surface charges and the other half with positive surface charges? I've noticed this in every surface charge distribution I've seen.




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