1) There are 4 pillars that form the foundation of Electricity & Magnetism: Gauss' Law for Electricity, Gauss' Law for Magnetism, Faraday's Law of Induction, and Ampere's Law. 2) Gauss' Law relates the electric flux through a closed surface to the electric charge enclosed by the surface. The electric field coming through a certain area is proportional to the charge enclosed. 3) Maxwell's Equations unified electricity, magnetism, and light as manifestations of the electromagnetic field.