Coulomb’s Law
http://en.wikipedia.org/wiki/Coulomb%27s_law
Lorentz Force Law
http://en.wikipedia.org/wiki/Lorentz_force
Maxwell’s Equations
http://en.wikipedia.org/wiki/Maxwell%27s_equations
Every aspect of the electromagnetic field can be explained using Maxwell’s Equations for light.

Ampere’s Law
http://en.wikipedia.org/wiki/Amp%C3%A8re%27s_circuital_law
Faraday’s Law
http://en.wikipedia.org/wiki/Faraday%27s_law_of_induction
Gauss’s Law
http://en.wikipedia.org/wiki/Gauss%27s_law_for_magnetism
No Name Law
http://en.wikipedia.org/wiki/Displacement_current
Togther with the Continuity Equation these 5 equations successfully describe every experimentally observed phenomenon associated with electromagnetism.
A physics professor named Oleg D. Jefimenko is the only person in history to discover problems with (and make corrections to) this theory.
Jefimenko’s Equations
By accounting for relativity in Maxwell’s Equations, Jeffimenko was able to factor in the delayed or “retarded” time that it takes for electromagnetic fields to travel through freespace and cause interactions. Since Maxwell’s Equations are easier to use with Potentials, rather than trying to solve for complex integrals, the regular potentials become “retarded potentials” because they are time delayed and by accounting for this tweak of physics in the math it we get right answers.
Jefimenko first published these equations in his text book on Electricity & Magnetism. They henceforth became known as “Jefimenko’s Equations” since no one could find any earlier discovery or publication besides his.
Electro Motive Force
Understanding this is crucial for producing electrical power cells
http://en.wikipedia.org/wiki/Electromotive_force
Conservation Laws and Consequences of E&M
Line Integral Theorems
Biot Savart Law
http://en.wikipedia.org/wiki/Biot%E2%80%93Savart_law
Stokes Theorem
http://en.wikipedia.org/wiki/Stokes%27_theorem
Lenz’s Law