Types of Permittivity
There are two types of permittivity:
- Permittivity of Free Space
- Relative Permittivity
Let’s dicuss these types as below:
Permittivity of Free Space (ε₀)
The resistivity offered by the free space is the lowest and is the fundamental constant, it is referred as permittivity of free space and is denoted by ε₀. It has a value of 8.85✕ 10-12 Farad/meter.
Relative Permittivity (εr)
Dielectric material also shows permittivity, it is represented as the ratio of absolute permittivity of the medium or material and the permittivity of free space, known as relative permittivity. Thus relative permittivity is a dimensionless quantity, represented as εr.
Formula for Relative Permittivity (εr) is given as:
εr = ε/ε₀
Where,
- εr is the relative permittivity of the material,
- ε is the absolute permittivity of the material, and
- ε₀ is the permittivity of the free space.
Permittivity and Permeability
Permittivity and Permeability are two fundamental properties of materials that play a crucial role in the behavior of electromagnetic waves and related fields. Permittivity, represented by the symbol ε (epsilon), describes a material’s ability to permit the electric field to pass through it. Permittivity is a measure of how easily electric charges can be separated within the material in response to an applied electric field. On the other hand, Permeability, denoted as μ (mu), characterizes a material’s ability to allow magnetic fields to pass through it. Permeability represents how readily magnetic flux can propagate within the material when subjected to a magnetic field.
Together, Permittivity and Permeability determine the speed at which electromagnetic waves, such as light and radio waves, travel through a given medium. This article provides a brief description of both Permittivity and Permeability, other than that we will also discuss the key differences between Permittivity and Permeability.
Table of Content
- What is Permittivity?
- Types of Permittivity
- What is Permeability?
- Types of Permeability
- Difference between Permittivity and Permeability