Changes

The '''coulomb''' (symbol C, for [[C. A. Coulomb]]) is that amount of [[electric charge]] that passes through a conductor in one second at a current of one ampere. To calculate, multiply current by time.

The '''coulomb''' (symbol C, for [[C. A. Coulomb]]) is that amount of [[electric charge]] that passes through a conductor in one second at a current of one ampere. To calculate, multiply current by time.

==== Volt ====

==== Volt ====

The '''[[volt]]''' (symbol V, named after Alessandro Volta) is the [[electric potential]] difference between two conductors having a current flow of one ampere from one to another, and dissipating one watt of power. Most people find the phrase "electric potential" hard to understand and the alternative "electromotive force" to be hard to pronounce. They therefore use the word "voltage" for this quantity. To calculate, divide power by current--or divide work (or energy) by electric charge.

The '''volt''' (symbol V, named after Alessandro Volta) is the [[electric potential]] difference between two conductors having a current flow of one ampere from one to another, and dissipating one watt of power. People often use the word "voltage" to refer to this electric potential difference, since it is a much simpler term.  An old-fashioned term for the same phenomenon was "electromotive force".  One still sees references to "E.M.F.".

 

Voltage appears in many extremely common formulas relating to such things as resistance, current, and power.  For example, one can calculate voltage as power divided by current, or work (or energy) divided by electric charge.

==== Ohm ====

==== Ohm ====