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Description of charged sphere with Heaviside function in cylindrical coordinates
I need to describe density of charge of uniformly charged sphere (radius R, total charge Q, position of centre (0,0,0)) with Dirac delta function and Heaviside step function. The hard part is to ...
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Energy of continious charge distribution
In the book of Griffith intro to electrodynamics, on page 94, the energy of continuous charge distribution is derived in the following way:
W(total energy) = $\frac{1}{2} \int\rho V d\tau$, where $\...
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