ABSTRACT
This chapter discusses the electrical force comes from and some applications of it in technology. The electric force is what holds electrons in their orbits around the nucleus. To explains how charges can influence each other at a distance, the concept of the electric field was invented. An electric field is something that surrounds the space around the charge in which another charge reacts to. This is similar to the gravitational field, where one body can influence the other at a distance. The electric field E has a magnitude and direction and is therefore vector. The force on a charge will be in the same direction as the electric field if the charge is positive and in the opposite direction if the charge in negative. The electric field is related to something we are more familiar with, that is, voltage. Voltage is effectively the "electrical pressure" that drives the charges to move in a circuit.
