Question

Dielectric constant or relative permitivity

Answer 1

Answer:

• The dielectric constant - also called the relative permittivity indicates how easily a material can become polarized by imposition of an electric field on an insulator. Relative permittivity is the ratio of "the permittivity of a substance to the permittivity of space or vacuum".

Answer 2

$</p><p>\huge\mathfrak{\underline{\underline{\red{dielectric \: constant}}}}$

$<font color=blue>$

Permittivity is a material property that affects the Coulomb force between two point charges in the material. Relative permittivity is the factor by which the electric field between the charges is decreased relative to vacuum.

Likewise, relative permittivity is the ratio of the capacitance of a capacitor using that material as a dielectric, compared with a similar capacitor that has vacuum as its dielectric. Relative permittivity is also commonly known as the dielectric constant, a term still used but deprecated by standards organizations in engineering as well as in chemistry.

$<font color=black>$

Relative permittivity is typically denoted as εr(ω) (sometimes κ, lowercase kappa) and is defined as

$</p><p></p><p>{\displaystyle \varepsilon _{r}(\omega )={\frac {\varepsilon (\omega )}{\varepsilon _{0}}},}$

where ε(ω) is the complex frequency-dependent permittivity of the material, and ε0 is the vacuum permittivity.

Relative permittivity is a dimensionless number that is in general complex-valued; its real and imaginary parts are denoted as

$</p><p>{\displaystyle \varepsilon _{r}(\omega )=\varepsilon _{r}'(\omega )-i\varepsilon _{r}''(\omega ).}$

The relative permittivity of a medium is related to its electric susceptibility,

$χe, as \: εr(ω) = 1 + χe.$