Jisho

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Noun
1. dielectric constant; relative permittivity; specific inductive capacity
Wikipedia definition
2. Relative permittivityThe 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.
Read “Relative permittivity” on English Wikipedia
Read “比誘電率” on Japanese Wikipedia
Read “Relative permittivity” on DBpedia

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