Calculate electric potential (voltage): When a charge, q, is pulled through a field, E, over a distance, d, work, W = qd, is done. The work done per unit charge, W/q, is the electric potential, V. Thus, V = Ed. The unit of electric potential is the volt, V; 1 V = 1 N(m/C).
The phenomena that fall into the categories known as electrostatics and electromagnetism are due respectively to the behavior of stationary and moving charged particles. As a basis for understanding this concept, students: