siemens

siemens
/see"meuhnz/, n. (used with a sing. v.)
Elect. the SI unit of electrical conductance, equal to the reciprocal of the ohm and replacing the equivalent MKS unit (mho). Abbr.: S
[1930-35; named after Sir W. SIEMENS]

* * *

(as used in expressions)
Siemens Martin process
Siemens Sir Charles William
Karl Wilhelm Siemens

* * *

▪ unit of energy measurement
      unit of electrical conductance. In the case of direct current (DC), the conductance in siemens is the reciprocal of the resistance in ohms (ohm) (S = amperes (ampere) per volts (volt)); in the case of alternating current (AC), it is the reciprocal of the impedance (electrical impedance) in ohms. A former term for the reciprocal of the ohm is the mho (ohm spelled backward). It is disputed whether the siemens was named after the German-born engineer-inventor Sir William Siemens (Siemens, Sir William) (1823–83) or his brother, the electrical engineer Werner von Siemens (Siemens, Werner von) (1816–92).

* * *


Universalium. 2010.

Игры ⚽ Нужен реферат?

Look at other dictionaries:

  • Siemens — AG Rechtsform Aktiengesellschaft ISIN DE0007236101 Gründung 1 …   Deutsch Wikipedia

  • Siemens AG — Unternehmensform Aktiengesellschaft ISIN …   Deutsch Wikipedia

  • Siemens AG — Год основания 1847 (Берлин, Пруссия) Основатели Вернер фон Сименс Ключевые фигуры Петер Лёшер (главн …   Википедия

  • Siemens AG — Pour les articles homonymes, voir Siemens. Logo de Siemens AG …   Wikipédia en Français

  • Siemens AG — Tipo Sociedad anónima (AG) (Plantilla:ISIN, Plantilla:FWB, NYSE: SI) …   Wikipedia Español

  • Siemens TS — Siemens Mobility Verwaltungsgebäude am Standort in Krefeld Uerdingen …   Deutsch Wikipedia

  • Siemens ER 20 — Siemens ER20 (B)U/(B)F Anzahl: 131 ER20 14 ER20 F Hersteller: Siemens TS Baujahr(e): ab 2002 …   Deutsch Wikipedia

  • Siemens ER 20 BF — Siemens ER20 (B)U/(B)F Anzahl: 131 ER20 14 ER20 F Hersteller: Siemens TS Baujahr(e): ab 2002 …   Deutsch Wikipedia

  • Siemens ER 20 BU — Siemens ER20 (B)U/(B)F Anzahl: 131 ER20 14 ER20 F Hersteller: Siemens TS Baujahr(e): ab 2002 …   Deutsch Wikipedia

  • Siemens ER 20 F — Siemens ER20 (B)U/(B)F Anzahl: 131 ER20 14 ER20 F Hersteller: Siemens TS Baujahr(e): ab 2002 …   Deutsch Wikipedia

  • Siemens AG — (Aktiengesellschaft: Sociedad Anónima), es una empresa multinacional de origen alemán y dedicada a las telecomunicaciones, el transporte, la iluminación, a través de Osram, a la medicina, al financiamiento y a la energía, entre otras áreas de la… …   Enciclopedia Universal

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”