the derived SI unit of electrical conductance equal to 1 reciprocal ohm.
1. Ernst Werner von . 1816--92, German engineer, inventor, and pioneer in telegraphy. Among his inventions are the self-excited dynamo and an electrolytic refining process
2. his brother, Sir William, original name Karl Wilhelm Siemens. 1823--83, British engineer, born in Germany, who invented the open-hearth process for making steel
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.
the unit of electrical conductivity in the International System of Units (SI). Named in honor of W. von Siemens, the unit has the designation S in the international system. A Siemens is equal to the electrical conductivity of a conductor having a resistance of 1 ohm. In the 19th century, the Siemens was a unit of electrical resistance. Now obsolete, it was equal to the resistance of a column of mercury with a length of 1 m and a cross-sectional area of 1 mm2 at 0°C.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
A unit of conductance, admittance, and susceptance, equal to the conductance between two points of a conductor such that a potential difference of 1 volt between these points produces a current of 1 ampere; the conductance of a conductor in siemens is the reciprocal of its resistance in ohms. Formerly known as mho (Ω); reciprocal ohm. Symbolized S.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
A German semiconductor and electronics manufacturer.
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Siemens(Siemens AG, Munich, Germany, www.siemens.com) A leading European electrical and electronics firm founded in 1847. Siemens has more than 430,000 employees in nearly 200 countries, and more than 50,000 professionals are engaged in research and development. In 1990, the computer division of Siemens and Nixdorf merged to become Siemens Nixdorf. In 1998, Siemens Nixdorf split into Siemens Computer Systems (later Fujitsu Siemens Computers) and Wincor Nixdorf. See Fujitsu Siemens.
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