Ohm's Law - The
relationship of voltage, current and resistance in a circuit I=V/R, V=IR,
R=V/I

Current - The total amount of electrons flowing
through a circuit per unit time; measured in Amperes
Resistance - The ratio of
the potential difference across an electrical component to the current
passing through it. It is thus a measure of the component's opposition
to the flow of electric charge.
Voltage - The
electromotive force in a circuit.
Watt's Law - The
mathematical relationship expressing that power is the product of
Voltage and Current
Electromagnet - A core of magnetic material
surrounded by a coil of wire through which an electric current is passed
to magnetize the core.
Electromagnetic Energy -
The energy associated with electricity, magnetism, and electromagnetic
waves.
Semiconductor - Materials whose electrical
conductivity can be precisely altered by appropriate manufacturing
processes.