What is permittivity and relative permittivity? How are they related?
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Permittivity :- In a simple word, Permittivity is define as any dielectric material which is used to allow electric field through it. As the less relative permittivity material allow easily electric field through it , and the much relative permittivity material cannot allow electric field lines through it, as the tangential loss is more.
So the formula for permittivity would be :- In a material , permittivitty ε is
ε = ε₀ εr
where εr is the relative permittivity here. In a free space εr = 1
Therefore,
ε = ε₀ . [ ε₀ = 8.85 × 10⁻¹² F/m ] .
Relative permittivity :- Relative permittivity is the factor which affect to decrease the electric field b/w the charges from relative to vacuum or free space It is also knowm as dielectric constant .
Relation b/w Permittivity & electric permittivity :-
We know that permittivity as well as relative permittivity both are related to electric filed lines and capacitance too.
k = ε / ε₀
→If the dielectric or k is low then the permittivity is also low . The low permittivity material is also a good insulator .
→If the dielectric k is high then permittivity is high too, and the material can be used as memory storage device that store a digital data .
Hope it Helps :-)
So the formula for permittivity would be :- In a material , permittivitty ε is
ε = ε₀ εr
where εr is the relative permittivity here. In a free space εr = 1
Therefore,
ε = ε₀ . [ ε₀ = 8.85 × 10⁻¹² F/m ] .
Relative permittivity :- Relative permittivity is the factor which affect to decrease the electric field b/w the charges from relative to vacuum or free space It is also knowm as dielectric constant .
Relation b/w Permittivity & electric permittivity :-
We know that permittivity as well as relative permittivity both are related to electric filed lines and capacitance too.
k = ε / ε₀
→If the dielectric or k is low then the permittivity is also low . The low permittivity material is also a good insulator .
→If the dielectric k is high then permittivity is high too, and the material can be used as memory storage device that store a digital data .
Hope it Helps :-)
Answered by
9
Permittivity is a material property that affects the coulomb force between two point charges in the material.
F=k(q1 q2)/r2
where k is constant, whose value is (1/4πε₀ ) where ε₀ is called as permittivity of free space.
The value of ε₀ in free space is 8.854 x 10⁻¹² C²N⁻¹ m⁻²
Relative Permittivity is called as dielectric constant of medium denoted as K or εr
It is also defined as the ratio of forces between two point charges separated by a certain distance in free space or vacuum to the force between the same two points charges separated by the same distance in medium.
Relation between Permittivity and relative Permittivity :
ε=ε₀ εr
where ε is the Permittivity of intervening medium.
F=k(q1 q2)/r2
where k is constant, whose value is (1/4πε₀ ) where ε₀ is called as permittivity of free space.
The value of ε₀ in free space is 8.854 x 10⁻¹² C²N⁻¹ m⁻²
Relative Permittivity is called as dielectric constant of medium denoted as K or εr
It is also defined as the ratio of forces between two point charges separated by a certain distance in free space or vacuum to the force between the same two points charges separated by the same distance in medium.
Relation between Permittivity and relative Permittivity :
ε=ε₀ εr
where ε is the Permittivity of intervening medium.
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