in electric potential energy per unit positive charge between the two points (i.e. 
). [P2.6, P4.1]
between: point A and point B in an electric field
is: the difference in electric potential energy per unit positive charge between the two points (i.e. ). [P2.6, P4.1]
is therefore: the negative of the work done per unit charge by an electric field when a unit charge is moved from A to B. [M2.6]
is also called: voltage difference. [P4.1]
has as its SI unit: the volt, (V), where 
(i.e. 1 joule per coulomb). [P4.1]
Copyright 1997, The Open University