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Physics
Classical Physics
Electromagnetism
Difference between charge and charge density
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[QUOTE="Forrest Guyton, post: 5866068"] As far as I understand what you are asking they are asking you to calculate charge density on a sphere in terms of Q and r. your awnser ought not to have anything to do with the electric field. Much like mass density, charge density is the amount of charge/space The surface charge density is defined as amount of charge per unit area of the surface. The question is how much charge is in a little shell on the surface between radius r and r+dr per unit area. in other words: ##\frac{q_{surface}}{A_{sphere}}##. Think for a second: what would happen to a bunch of charges inside of a conducting sphere considering that like charges repel. How much of that charge would be on the surface? [/QUOTE]
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Forums
Physics
Classical Physics
Electromagnetism
Difference between charge and charge density
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