Outlined below is a zip code list for Portland. Select a zip code you are interested in to find zip code data on demographics, family, housing, education, transportation, and real estate. See the Portland Zip Code Map.
For other uses, see Volt (disambiguation). The volt (symbol: V) is the derived unit for electric potential, electric potential difference (voltage), and electromotive force.
The symbol for an ohm is Ï or W. One ampere is the unit of measurement of electrical current produced in a circuit by 1 volt acting through a resistance of 1 ohm. With an ordinary coil of around 10,000 ohms resistance, the most powerful arc would be produced with about 12,000 alternations per second. An ohm is a unit of measurement of electric resistance.