Permittivity of free Space - ε0

The electric field around an object is greater when the charge is more concentrated. The electric field strength E is proportional to the charge per unit area on the surface of a plate. The constant of proportionality is 1/ε₀, where ε₀ is called the permittivity of free space and has the value 8.85×10^-12Fm^-1.
Q/A= ε₀EThe permittivity of free space is a physical constant that reflects the ability of electrical fields to pass through a classical vacuum. Permittivity is a property of a material that measures the opposition it offers against an electric field.ExampleFor a positive point charge with a radial field, the field is evenly distributed over the surface of a sphere with the charge at its centre.The charge per unit area on the surface at which the electric field strength is 1Vm^-1 is given by Q/A = ε₀E = 8.85×10^-12×1
=8.85×10^-12Cm^-2