Work must be done to hold back the unlike charges

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Unformatted text preview: Energy of Two Charges •  If the charges have the same sign, PE is posi,ve. –  Posi,ve work must be done to force the two charges near one another. –  The like charges would repel. •  If the charges have opposite signs, PE is nega,ve. –  The force would be a@rac,ve. –  Work must be done to hold back the unlike charges from accelera,ng as they are brought close together. Poten,als and Charged Conductors •  Since W = - q(VB – VA), no net work is required to move a charge between two points that are at the same electric poten,al. –  W = 0 when VA = VB •  All points on the surface of a charged conductor in electrosta,c equilibrium are at the same poten,al. •  Therefore, the electric poten,al is constant everywhere on the surface of a charged conductor in electrosta,c equi...
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