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Concept information

physical property > electrical property > permittivity

Terme préférentiel

permittivity  

Définition(s)

  • In electromagnetism, the absolute permittivity, often simply called permittivity and denoted by the Greek letter ε (epsilon), is a measure of the electric polarizability of a dielectric. A material with high permittivity polarizes more in response to an applied electric field than a material with low permittivity, thereby storing more energy in the material. In electrostatics, the permittivity plays an important role in determining the capacitance of a capacitor. In the simplest case, the electric displacement field D resulting from an applied electric field E is D = εE. More generally, the permittivity is a thermodynamic function of state. It can depend on the frequency, magnitude, and direction of the applied field. The SI unit for permittivity is farad per meter (F/m). (Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/wiki/Permittivity)

Concept(s) générique(s)

Synonyme(s)

  • dielectric constant

Traductions

URI

http://data.loterre.fr/ark:/67375/MDL-NJVSJZXB-6

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