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The volt is named after Alessandro Volta. As with every SI unit named for a person, its symbol starts with an upper case letter (V), but when written in full, it follows the rules for capitalisation of a common noun; i.e., volt becomes capitalised at the beginning of a sentence and in titles but is otherwise in lower case.
The abbreviation is not always a short form of the word used in the clue. For example: "Knight" for N (the symbol used in chess notation) Taking this one stage further, the clue word can hint at the word or words to be abbreviated rather than giving the word itself. For example: "About" for C or CA (for "circa"), or RE.
This is a list of scientific units named after people. For other lists of eponyms (names derived from people) see eponym . By convention , the name of the unit is properly written starting with a lowercase letter (except where any word would be capitalized), but the first letter of its symbol is a capital letter if it is derived from a proper name.
Unit name Symbol Base units E energy: joule: J = C⋅V = W⋅s kg⋅m 2 ⋅s −2: Q electric charge: coulomb: C A⋅s I electric current: ampere: A = C/s = W/V A J electric current density: ampere per square metre A/m 2: A⋅m −2: U, ΔV; Δϕ; E, ξ potential difference; voltage; electromotive force: volt: V = J/C kg⋅m 2 ⋅s −3 ⋅A ...
This page was last edited on 5 June 2015, at 18:42 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply ...
volt-ampere reactive (var), a unit used to measure reactive power in an AC system; Volt meter, instrument for measuring electrical potential; Volt-ohm meter (VOM), instrument that combines several electrical measurement functions; volt-second (V⋅s), more commonly the weber (Wb), a unit of magnetic flux; Volts Center Tapped (VCT), a unit of ...
The SI unit of work per unit charge is the joule per coulomb, where 1 volt = 1 joule (of work) per 1 coulomb of charge. [citation needed] The old SI definition for volt used power and current; starting in 1990, the quantum Hall and Josephson effect were used, [10] and in 2019 physical constants were given defined values for the definition of all SI units.
SI multiples of volt (V) Submultiples Multiples Value SI symbol Name Value SI symbol Name 10 −1 V dV decivolt 10 1 V daV decavolt 10 −2 V cV centivolt 10 2 V hV hectovolt 10 −3 V mV millivolt 10 3 V kV kilovolt 10 −6 V μV microvolt 10 6 V MV megavolt 10 −9 V nV nanovolt 10 9 V GV gigavolt 10 −12 V pV picovolt 10 12 V TV teravolt