what is permittivity
Permittivity is a measure of how easy or difficult it is to form an electric field inside of a medium. Likewise, permeability is a measure of the ability to form a magnetic field inside of a medium. Permittivity Îµ and Îµ0. Permittivity is determined by how much a medium can polarize in response to an electric field. In cgs units, Îµ is unitless. In SI units, Îµ is in units of Farads/meter. This highlights the fundamental difference between the two measures of permittivity in the different unit systems.