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현재 위치

Permittivity

작성자 Uploader : ezelec 작성일 Upload Date: 2016-05-28변경일 Update Date: 2016-05-28조회수 View : 355

In electromagnetism, permittivity or absolute permittivity is the measure of resistance that is encountered when forming an electric field in a medium. In other words, permittivity is a measure of how an electric field affects, and is affected by, a dielectric medium. The permittivity of a medium describes how much electric field (more correctly, flux) is "generated" per unit charge in that medium. More electric flux exists in a medium with a low permittivity (per unit charge) because of polarization effects. Permittivity is directly related to electric susceptibility, which is a measure of how easily a dielectric polarizes in response to an electric field. Thus, permittivity relates to a material's ability to resist an electric field (while, unfortunately, the word stem "permit" suggests the inverse quantity).

In SI units, permittivity ε is measured in farads per meter (F/m or F·m^-1); electric susceptibility χ is dimensionless. They are related to each other through

ε=εr * ε0

where εr is the relative permittivity of the material, and ε0 = 8.8541878176.. × 10^-12 F/m is the vacuum permittivity.

Changing the unit F/m to ㎌/mm,

ε=εr * ε0 * 1000 = εr * 8.8541878176.. × 10^-9

*** 참고문헌[References] ***

https://en.wikipedia.org/wiki/Permittivity
https://en.wikipedia.org/wiki/Relative_permittivity

ε = εr × 8.8541878176 × 10^(-9)

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현재 위치

Permittivity

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