### Electromagnetism Basics

From wikipedia Quantities and units

vte Symbol[4]Name of QuantityDerived UnitsUnitBase Units

**Electromagnetic units**are part of a system of electrical units based primarily upon the magnetic properties of electric currents, the fundamental SI unit being the ampere. The units are: ampere (electric current)coulomb (electric charge)farad (capacitance)henry (inductance)ohm (resistance)siemens (conductance)tesla (magnetic flux density)volt (electric potential)watt (power)weber (magnetic flux) In the electromagnetic cgs system, electric current is a fundamental quantity defined via Ampère's law and takes the permeability as a dimensionless quantity (relative permeability) whose value in a vacuum is unity. As a consequence, the square of the speed of light appears explicitly in some of the equations interrelating quantities in this system. SI electromagnetism unitsvte Symbol[4]Name of QuantityDerived UnitsUnitBase Units

*I*electric currentampere (SI base unit)AA (= W/V = C/s)*Q*electric chargecoulombC