The dielectric constant shows how well a material holds electric charge. It compares this ability to a vacuum. You can find it using the formula κ = ε/ε₀. Here, ε is the material’s permittivity, and ε₀ is free space’s permittivity (about 8.854 x 10⁻¹² F/m). This value is important in electromagnetism. Previous Next The dielectric constant The dielectric constant of a material provides a measure of its effect on a capacitor. It is the ratio of the capacitance of a capacitor containing the dielectric to that of an identical but empty capacitor. An alternative definition of the dielectric constant relates to the permittivity of the material. Permittivity is a quantity that describes the effect of a material on an electric field: the higher the permittivity, the more the material tends to ... Relative permittivity is the permittivity of a material expressed as a ratio with the electric permittivity of a vacuum. It measures the ability of the material to store electric energy in an electrical field and is also known as dielectric constant . Learn what dielectric constant is, how to calculate it, and how it affects materials and devices. Explore the examples, concepts, and applications of dielectric constant in physics and engineering.

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