Changes

==== Ohm ====

==== Ohm ====

The '''[[ohm]]''' (symbol Ω, for [[Georg Simon Ohm]]) is that amount of [[electric resistance]] that requires an electric potential difference of one volt to push a current of one ampere through it. To calculate, divide electrical potential by current.

The '''[[ohm]]''' (symbol Ω<ref>That's the Greek letter omega.  Never let it be said that physicists don't have a sense of humor.</ref>, for [[Georg Simon Ohm]]) is that amount of [[electric resistance]] that requires an electric potential difference of one volt to push a current of one ampere through it. To calculate, divide electrical potential by current.

 

==== Siemens ====

==== Siemens ====

The '''siemens''' (symbol S, for [[Werner von Siemens]]) is the unit of [[electric conductance]], which is merely the reciprocal of resistance. In essence, the siemens is that level of conductance required to ''allow'' a current of one ampere to flow through a load after an electric potential of one volt is applied. To calculate it, divide current by electric potential or "voltage," rather than dividing voltage by current.

The '''siemens''' (symbol S, for [[Werner von Siemens]]) is the unit of [[electric conductance]], which is merely the reciprocal of resistance. In essence, the siemens is that level of conductance required to ''allow'' a current of one ampere to flow through a load after an electric potential of one volt is applied. To calculate it, divide current by electric potential or "voltage," rather than dividing voltage by current.