chp28_5 - = KQ/r U = qV = work done against the electric...

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PHY2061 R. D. Field Department of Physics chp28_5.doc University of Florida The Electric Potential of a Point Charge +Q E r V(r) V(r) = KQ/r Potential from a point charge: V(r) = V = V(r) - V( infinity
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Unformatted text preview: ) = KQ/r U = qV = work done against the electric force in bringing the charge q from infinity to the point r. +Q q E Potential from a system of N point charges: V Kq r i i i N = = ∑ 1...
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