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Electrostatics - Charge Density |
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| Nov5-08, 02:14 PM | #1 |
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Electrostatics - Charge Density
Hi,
if we only have an electrostatic potential given. How to calculate the charge density? I know of course Maxwell equation, here without any time dependence, but I missed always some further specifications, or I forget something important   thanks greetings |
| Nov5-08, 02:59 PM | #2 |
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Recognitions:
 Science Advisor |
Use Laplace's equation (derived from Gauss's Law):
[tex]-\nabla^2 \Phi = \rho / \epsilon_0[/tex] |
| Nov5-08, 03:54 PM | #3 |
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Recognitions:
Science Advisor |
That's Poisson, not Laplace.
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| Nov6-08, 11:38 AM | #4 |
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Electrostatics - Charge Density
Thanks, that helps a lot.
 I knew Poissons equation, but I forgot it. Damn...  Greetings |
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