Question

what is relative permittivity??​

Answer 1

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Relative permittivity is the factor by which the electric field between the charges is decreased relative to vacuum.

Likewise, relative permittivity is the ratio of the capacitance of a capacitor using that material as a dielectric, compared with a similar capacitor that has vacuum as its dielectric.

Answer 2

$\large\underline{\pink{\sf \red{\maltese} Concept \: Of \:Relative\: Permittivity:-}}$

• ⭗ The relative permittivity εr of a medium is defined as the ratio of the capacitances of a capacitor with and without the dielectric in place.

• ⭗ The capacitance is described by its charge density σ and plate area A.

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