← Unit 3: Electric Force, Field, and Potential
Electric Field & Potential
An electric field describes the force per unit charge at a point in space; electric potential describes the potential energy per unit charge.
Overview
E = F/q = kQ/r² for a point charge. Electric potential V = kQ/r. Field lines point from positive to negative charges, always perpendicular to equipotential surfaces.
Practice Quiz
Question 1 of 1Score so far: 0/0
Electric field lines around a point charge are drawn. Equipotential surfaces relative to these field lines are always: