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Scalar and vector potentials in electromagnetism. The scalar potential is potential energy per unit charge. For potential energy, use the [potential-energy] tag.

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Can a positive charge have a negative potential?

This makes the work done negative and potential also negative as work done is stored in form of potential energy and potential is for unit charge. But for positive charge, you do against its will. … You are increasing the potential energy of system and thus doing work leading to increase in potential for a unit charge. Hope it helps! …
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