The relative permittivity (in older texts, dielectric constant) is the permittivity of a material expressed as a ratio with the electric permittivity of...
16 KB (2,033 words) - 02:54, 19 May 2024
In electromagnetism, the absolute permittivity, often simply called permittivity and denoted by the Greek letter ε (epsilon), is a measure of the electric...
34 KB (4,422 words) - 17:09, 28 May 2024
Vacuum permittivity, commonly denoted ε0 (pronounced "epsilon nought" or "epsilon zero"), is the value of the absolute dielectric permittivity of classical...
17 KB (2,237 words) - 00:03, 26 May 2024
the absolute permeability and permittivity of the medium, εr is the material's relative permittivity, and μr is its relative permeability. In non-magnetic...
76 KB (8,490 words) - 15:40, 22 April 2024
Curie temperature (section Relative permittivity)
Curie–Weiss law applies to the dielectric constant, also known as the relative permittivity: ϵ = ϵ 0 + C T − T 0 . {\displaystyle \epsilon =\epsilon _{0}+{\frac...
46 KB (4,786 words) - 23:58, 9 April 2024
Permeability (electromagnetism) (redirect from Magnetic permittivity)
coined by William Thomson, 1st Baron Kelvin in 1872, and used alongside permittivity by Oliver Heaviside in 1885. The reciprocal of permeability is magnetic...
23 KB (2,116 words) - 07:29, 29 April 2024
polarisability. The latter is expressed by a number called the relative permittivity. Insulator is generally used to indicate electrical obstruction...
37 KB (4,758 words) - 02:59, 18 May 2024
frequently given as dimensionless constants; relative permittivity: ϵ r {\displaystyle \epsilon _{\text{r}}} and relative permeability: μ r {\displaystyle \mu...
44 KB (5,298 words) - 21:23, 8 May 2024
mathematical formula for the frequency dependence of the complex-valued relative permittivity, sometimes referred to as the dielectric function. The model has...
8 KB (1,217 words) - 17:00, 5 January 2024
Coulomb forces are screened in a crystal, which is expressed as a relative permittivity εr significantly larger than 1 and (b) the Effective mass of the...
35 KB (4,613 words) - 03:11, 23 March 2024
measurement of skin hydration. It uses a capacitive sensor to measure the relative permittivity of upper skin layers. Because these depend on hydration of skin...
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the degree of alignment is measured by the relative permittivity. Water has a high relative permittivity of about 80 at room temperature; because polarity...
24 KB (2,734 words) - 20:51, 4 April 2024
Mossotti and Rudolf Clausius, expresses the dielectric constant (relative permittivity, εr) of a material in terms of the atomic polarizability, α, of...
8 KB (1,093 words) - 22:59, 7 December 2023
vector, ε {\displaystyle \varepsilon } is the relative permittivity, and μ {\displaystyle \mu } is the relative permeability of the material (1: the glass...
30 KB (3,645 words) - 02:07, 15 February 2024
εr″ is the imaginary part of the complex relative permittivity of the absorbing material, ε0 is the permittivity of free space and E the electric field...
18 KB (2,364 words) - 20:15, 5 November 2023
is the absolute permittivity of free space in farads per meter (F/m) and ϵ r {\displaystyle \epsilon _{r}} is the relative permittivity of the material...
44 KB (6,550 words) - 01:09, 24 April 2023
\varepsilon _{\mathrm {r} }=\epsilon /\epsilon _{0}} is the material's relative permittivity or dielectric constant (or in optics, the square of the refractive...
15 KB (2,135 words) - 17:17, 17 April 2024
existence of a so-called conductance minimum in solvents having the relative permittivity under 60 has proved to be a controversial subject as regards interpretation...
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defined for a medium with complex-valued relative permittivity ε r {\displaystyle \varepsilon _{r}} , relative permeability μ r {\displaystyle \mu _{r}}...
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where ε 0 {\displaystyle \varepsilon _{0}} is the vacuum permittivity (also called permittivity of free space), and P is the (macroscopic) density of the...
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Vacuum (section Relative versus absolute measurement)
fluctuations can produce transient virtual particle densities and a relative permittivity and relative permeability that are not identically unity. In the theory...
67 KB (7,632 words) - 01:20, 15 May 2024
two electric charges, separated by a distance, r in a medium of relative permittivity εr is given by force = z 1 z 2 e 2 4 π ϵ 0 ϵ r r 2 {\displaystyle...
16 KB (2,493 words) - 07:28, 27 August 2023
\varepsilon _{r}} is the relative dielectric constant of the medium and ε 0 {\displaystyle \varepsilon _{0}} is the vacuum permittivity. For water at room temperature...
3 KB (317 words) - 07:32, 10 December 2022
of relative permittivity and permeability much greater than one and close to each other; two different dielectric particles with equal permittivity but...
57 KB (9,186 words) - 13:31, 25 May 2024
breakdown (D48/50) > 50 kV Dielectric strength 20 MV/m Relative permittivity (A) 4.4 Relative permittivity (D24/23) 4.4 Dissipation factor (A) 0.017 Dissipation...
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(subtractive metallization, direct metal etch); air gaps to further reduce relative permittivity of intermetal dielectric and, therefore, interconnect capacitance;...
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54\times 10^{-5}{\text{ V/mil}}\end{aligned}}} Breakdown voltage Relative permittivity Rotational Brownian motion Paschen's law - variation of dielectric...
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{\displaystyle \varepsilon _{r}(\mathbf {r} )} is the local relative complex permittivity which takes the value ε m {\displaystyle \varepsilon _{m}} inside...
34 KB (4,292 words) - 01:16, 12 March 2024
precipitation in changing the nature of the solvent or the value of its relative permittivity (e.g., by replacing water by ethanol), or by increasing the ionic...
12 KB (1,334 words) - 01:13, 23 March 2024
noteworthy for its extremely large dielectric constant (effective relative permittivity) of over 10,000 at room temperature. CCTO was first synthesized...
7 KB (740 words) - 08:09, 8 November 2023