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.
(1) and (2) are standard capacitor circuit symbols. (3) is an example of capacitors symbols in action in a voltage regulator circuit. The symbol with the curved line (#2 in the photo above) indicates that the capacitor is polarized, meaning itâs probably an electrolytic capacitor. Maximum voltage-Each capacitor is rated for a maximum voltage that can be dropped across it. 2  Some capacitors might be rated for 1.5V, others might be rated for 100V. 3  Exceeding the maximum voltage will usually result in destroying the capacitor. 4  Leakage current-Capacitors arenât perfect.