Potential Difference. Potential difference , or voltage, is the difference inelectric potential energy between two points. It is denoted by ∆V and has units of volts, or joules per Coulomb. Potential is the specific potential energy.
Definition of potential difference
: the difference in potential between two points that represents the work involved or the energy released in the transfer of a unit quantity of electricity from one point to the other
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example of potential difference is the difference in potntial between the terminal of a battery