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A sphere of radius R carries a charge density kr(where k is a constant!).What will be the energy of the Configuration??
Meir Achuz said:1. Find the potential phi(r) inside the sphere.
2. Integrate rho*phi/2 over the volume of the sphere.
3. The algebra is a bit complicated. I get 35pi^2k^2R^7/72, but check me for errors.