unit:PERMITTIVITY_REL
http://qudt.org/vocab/unit/PERMITTIVITY_REL
unit:PERMITTIVITY_RELqudt:Unit| Predicate | Object |
|---|---|
rdf:type |
qudt:Unit |
dcterms:description |
The \(\textit{relative permittivity}\) of a material under given conditions reflects the extent to which it concentrates electrostatic lines of flux. In technical terms, it is the ratio of the amount of electrical energy stored in a material by an applied voltage, relative to that stored in a vacuum. Likewise, it is also the ratio of the capacitance of a capacitor using that material as a dielectric, compared to a similar capacitor that has a vacuum as its dielectric. Relative permittivity is a dimensionless number that is in general complex. The imaginary portion of the permittivity corresponds to a phase shift of the polarization \(P\) relative to \(E\) and leads to the attenuation of electromagnetic waves passing through the medium. \[\epsilon_r(w) = \frac{\epsilon(w)}{\epsilon_O}\], where \(\epsilon_r(w)\) is the complex frequency-dependent absolute permittivity of the material, and \(\epsilon_O\) is the vacuum permittivity. |
qudt:applicableSystem |
sou:CGS |
qudt:conversionMultiplier |
0.000000000008854187817 |
qudt:conversionMultiplierSN |
8.854187817E-12 |
qudt:dbpediaMatch |
http://dbpedia.org/resource/Relative_static_permittivity |
qudt:hasDimensionVector |
qkdv:A0E0L0I0M0H0T0D1 |
qudt:hasQuantityKind |
quantitykind:DimensionlessRatio |
qudt:informativeReference |
|
qudt:qkdvDenominator |
qkdv:A0E2L-3I0M-1H0T4D0 |
qudt:qkdvNumerator |
qkdv:A0E2L-3I0M-1H0T4D0 |
qudt:scalingOf |
unit:NUM |
qudt:symbol |
“εᵣ” |
qudt:ucumCode |
“[eps_0]”^^qudt:UCUMcs |
rdfs:isDefinedBy |
http://qudt.org/3.1.11/vocab/unit |
rdfs:label |
|