Define and explain the electrical force field by relating it to the gravitational force field and the magnetic force field. The force field holds in orbit an electron, which is in contact everywhere with the electrical field of a proton. Electrical fields are vector quantities with magnitude and direction. A gravitational field is affected by the size of the masses, and an electrical field is affected by the magnitude of the charge. Discuss the direction of the force, and that it emanates from a positive to a negative particle. Relate the electrical potential energy to work done in moving a particle against the field. Compare it to the gravitational potential energy.