What is Dielectric?
A dielectric is a material which has poor electrical conductivity but inherits an ability to store an electrical charge(due to Dielectric polarization). Thus exhibiting only displacement current making it ideal to build a capacitor; to store and return electrical energy.
What is Dielectric Constant?
The dielectric constant of a substance can be defined as the ratio of the permittivity of the substance to the permittivity of the free space
It expresses the extent to which a material can hold electric flux in it.
Dielectric Constant Formula
It is mathematically expressed as:
- κ is the dielectric constant
- 𝜺 is the permittivity of the substance
- 𝜺0 is the permittivity of the free space
Dielectric Constant Units
As it is the ratio of two like entities, it is a unitless, dimensionless quantity.
Dielectric Constant Symbol
The relative permittivity of a dielectric substance is also called a Dielectric Constant, expressed using the Greek letter kappa ‘κ’.
