Way back in 1752, when Benjamin Franklin attached a key to a kite and discovered electricity (there are those who say he really did not discover it, but we’ll give him the benefit of the doubt), it was a revolutionary discovery.  In addition to completely changing the way we do things, electricity has generated (pun intended) a litany of words.  Most people know the words, but do not know their meaning, or how they relate to each other.  So consider this a primer on electricity terms.

Electricity.  Let’s start with what electricity really is.  Electricity is a form of energy resulting from the existence of charged particles, such as electrons.  Electricity can be produced from a variety of sources ranging from coal and natural gas to “greener” sources such as wind and the sun.  These charged particles create electrical current.

Current.  Current is the flow of the electrical charge.  Current is measured in amps (or, officially, amperes).

Voltage.  Voltage represents the force with which electricity flows.  The higher the voltage, the greater the force.  Voltage pushes current through a resistance such as light bulbs, heating coils in toasters and ovens, and motors using power (wattage).  Voltage is measured in, you guessed it, volts.

Resistance.  Resistance is the opposition to the flow of electrical current present in light bulbs or other conductors.  That resistance is the reason these conductors generate heat and light.  Resistance is measured in ohms.

Here is how these relate.  Current (amps) = voltage (volts) divided by resistance (ohms)

One more definition

Power.  Power is the rate at which electric energy is transferred by an electric circuit.  Power is measured in watts.  Power (watts) is most common in describing and rating home wiring products.
And Power (watts) = Voltage (volts) multiplied by current (amps).