Electric Fields

Coulomb’s Law:

The size of the force that acts between two point charges is proportional to the product of their charges and inversely proportional to the square of their separation. It is attractive for opposite charges and repulsive for like charges.

Electric Field Strength

The force per unit positive charge exerted on a charged object placed at that point in the field. This is a vector acting in the same direction as the force on a positive charge.

Electric Field:

A region surrounding a charged object which causes a force to be exerted on any charged object placed within the field.

Electric Potential Energy

The work done on a positive charge in bringing it from infinity to that point in the field. It is proportional to the product of the two charges and inversely proportional to their separation.

Electric Potential:

The work done per unit charge on a positive test charge in bringing it from infinity to that point in the field.

Field Lines:

: Lines that demonstrate the direction in which a positive charge would feel if placed at that point in the field.

Parallel Plate Capacitor

A capacitor made up of two parallel conducting plates with an insulator between them (dielectric).

Permittivity:

A property of an electric field. It relates electric flux density and the electric field strength.