Key Stage 5
Meaning
Relative Permittivity is the ratio of the Permittivity of a medium compared to the Permittivity of Free Space.
About Relative Permittivity
- Relative permittivity of a medium is denoted with the Greek letter epsilon followed by a subscript of r (\(\varepsilon_r\)).
- Relative permittivity has no units.
Equation
- When an electrostatic field propagates through a medium which is not the vacuum the permittivity of that medium is given by the product of its relative permittivity and the permittivity of free space.