C = εr C0 with C0 ≡ ε0 A / d. This definition of relative permittivity is commonly found, and reads in words: εr is equal to the ratio of the capacitance of a capacitor filled with the dielectric to the capacitance of an identical capacitor in a vacuum without the dielectric material.
How is permittivity of dielectric calculated?
Permittivity and capacitance are mathematically related as follows: C = ε (A/d). When the dielectric used is vacuum, then the capacitance Co = ε o (A/d), where ε o is the permittivity of vacuum (8.85 x 10-12 F/m ).
What is value of permittivity?
The permittivity of free space (a vacuum) is a physical constant equal to approximately 8.85 x 10-12 farad per meter (F/m). ... In general, permittivity is symbolized and is a constant of proportionality that exists between electric displacement and electric field intensity in a given medium.
