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electric Potential



Potential, electric, work done against electric fields in bringing a unit charge to a given point from some arbitrary reference point (usually earthed), measured in volts (i.e., joules per coulomb). Charges tend to flow from points at one potential to those at a lower potential; potential difference, or voltage, thus plays the role of a driving force for electric current. In inductive circuits, the work done in bringing up the charge depends on the route taken, and potential ceases to be a useful concept.



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