permittivity

permittivity
/perr'mi tiv"i tee/, n., pl. permittivities.
Elect. the ratio of the flux density produced by an electric field in a given dielectric to the flux density produced by that field in a vacuum. Also called dielectric constant, relative permittivity, specific inductive capacity.
[1885-90; PERMIT + -IVE + -ITY]

* * *

      constant of proportionality that relates the electric field in a material to the electric displacement in that material. It characterizes the tendency of the atomic charge in an insulating material to distort in the presence of an electric field. The larger the tendency for charge distortion (also called electric polarization), the larger the value of the permittivity.

      The permittivity of an insulating, or dielectric, material is commonly symbolized by the Greek letter epsilon, ε; the permittivity of a vacuum, or free space, is symbolized ε0; and their ratio ε/ε0, called the dielectric constant (q.v.), is symbolized by the Greek letter kappa, κ.

      In the rationalized metre-kilogram-second (mks) and SI systems, the magnitude of the permittivity of a vacuum ε0 is 8.854 × 10−12. Its units and those of permittivity ε are square coulombs per newton square metre. In the mks system, permittivity ε and the dimensionless dielectric constant κ are formally distinct and related by the permittivity of free space ε0; ε = κε0. In the centimetre-gram-second (cgs) system, the value of the permittivity of free space ε0 is chosen arbitrarily to be 1. Thus, the permittivity ε and the dielectric constant κ in the cgs system are identical; both of them are dimensionless numbers.

* * *


Universalium. 2010.

Игры ⚽ Поможем решить контрольную работу

Look at other dictionaries:

  • permittivity — ☆ permittivity [pʉr΄mə tiv′ə tē ] n. [< PERMIT1 + IVE + ITY] DIELECTRIC CONSTANT …   English World dictionary

  • Permittivity — A dielectric medium showing orientation of charged particles creating polarization effects. Such a medium can have a higher ratio of electric flux to charge (permittivity) than empty space In electromagnetism, absolute permittivity is the measure …   Wikipedia

  • permittivity — /pɜməˈtɪvəti/ (say permuh tivuhtee) noun 1. absolute permittivity, the ratio of electric displacement to electric field strength in a dielectric medium. 2. relative permittivity, the ratio of the absolute permittivity of a medium to the absolute… …  

  • permittivity — dielektrinė skvarba statusas T sritis automatika atitikmenys: angl. dielectric constant; dielectric permittivity; permittivity vok. Dielektrizitätskonstante, f; Permittivität, f rus. диэлектрическая проницаемость, f pranc. constante diélectrique …   Automatikos terminų žodynas

  • permittivity — dielektrinė skvarba statusas T sritis Standartizacija ir metrologija apibrėžtis Dielektrikų fizikines savybes apibūdinantis vektorinis dydis, išreiškiamas iš formulės: D = εE; čia D – elektrinio srauto tankio vektorius, E – elektrinio lauko… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • permittivity — dielektrinė skvarba statusas T sritis Standartizacija ir metrologija apibrėžtis Elektrodinaminė terpės, kurios dalelės turi elektrinį krūvį ar magnetinį momentą, charakteristika. Pvz., dielektrinė skvarba apibūdina dielektrikų poliarizaciją… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • permittivity — dielektrinė skvarba statusas T sritis chemija apibrėžtis Elektrinio srauto tankio tiriamojoje medžiagoje ir elektrinio lauko stiprio santykis. atitikmenys: angl. dielectric constant; dielectric permittivity; permittivity rus. диэлектрическая… …   Chemijos terminų aiškinamasis žodynas

  • permittivity — skvarba statusas T sritis automatika atitikmenys: angl. permeability; permittivity vok. Permeabilität, f; Permittivität, f rus. проницаемость, f pranc. perméabilité, f; permittivité, f …   Automatikos terminų žodynas

  • permittivity — skvarba statusas T sritis Standartizacija ir metrologija apibrėžtis Dydis, apibūdinantis elektrines arba magnetines medžiagos savybes. atitikmenys: angl. permeability; permittivity vok. Permeabilität, f; Permittivität, f rus. проницаемость, f… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • permittivity — dielektrinė skvarba statusas T sritis fizika atitikmenys: angl. dielectric constant; permittivity vok. dielektrische Leitfähigkeit, f; Dielektrizitätskonstante, f; Permittivität, f rus. диэлектрическая постоянная, f; диэлектрическая проницаемость …   Fizikos terminų žodynas

Share the article and excerpts

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