From (4), electric potential due to a single point charge becomes, 1 q (6) V = 4 TEO T For a collection of point charges, (7) V = ATTEO E qi i ri For a continuous charge distribution, dq (8) V = 4TEO 2.2 Potential and Electric Field The electric potential is closely related to the electric field due to a charge (single, collection, or distribution). The relation is given by, b Va - Vb = E . dl or Va - Vb = E coso dl (9) a a