The value of the electric potential, V, at some position in space, →r, allows us to determine the electric potential energy, U, at that position for any charge, q: \[\begin{aligned...The value of the electric potential, V, at some position in space, →r, allows us to determine the electric potential energy, U, at that position for any charge, q: U=qV This is analogous to determining the force on a charge q when we know the electric field at some point in space: →F=q→E Differences in electric potential are called “voltages”, and the S.I.
