| Definition: | scalar, vector or tensor quantity, existing at each point of a defined space region and depending on the position of the point NOTE 1 A field quantity may be a function of time or any other parameter. NOTE 2 In English the term "field quantity", in French "grandeur de champ", is also used in IEC 60027-3 to denote a quantity such as voltage, electric current, sound pressure, electric field strength, the square of which in linear systems is proportional to power, whereas quantities proportional to power are called "power quantities", whether or not the quantities depend on the position of a point.
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