In this article, you will find the Study Notes on Electrostatics Part 3 which will cover the information such as Dielectric Constant and various relations and energy stored in a capacitor
Dielectric Constant
The relative permittivity of a material is known as its static relative permittivity or as its dielectric constant.
where, εr = Relative permittivity
ε0= Permittivity in vacuum
ε = Absolute permittivity
* Relaxation time or rearrangement time
It can be defined as
* Poisson’s equation 
* Laplace’s equation ∇2∇ = 0 in a charge-free (ρv = 0) region
Capacitance can be defined as
The capacitance of a parallel plate capacitor:
Where S cross-sectional area and d is a distance in between two plates.
Energy Stored in a Capacitor
Energy stored in a capacitor is given by
where, C, V & Q are the capacitance, potential and charge on a plate respectively.
For a coaxial capacitor
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