Potential Difference- difference in potential (voltage), between the ends of a conductor.
Electric Resistance- the resistance that the conductor offers to the flow of the charge.
Ohm's law-states that the current through a conductor between two points is directly proportional to the potential difference across the two points.
Alternating current- electrons in the circuit move first in one direction and then in the opposite direction, alternating back and forth about relatively fixed positions.
Diode- a tiny electronic device that acts as a one-way to valve to allow electron low in one direction
Electric power- the rate at which electrical energy is converted into another form such as mechanical energy, heat, or light.