What is relative permittivity?

1.	What is relative permittivity?
Answer» i. Relative permittivity or dielectric constant is the ratio of absolute permittivity of a medium to the permittivity of free space. It is denoted as K or ε_r. i.e., K or ε_r = ε/ε₀ ii. It is the ratio of the force between two point charges placed a certain distance apart in free space or vacuum to the force between the same two point charges when placed at the same distance in the given medium. i.e., K or ε_r = \(\frac{F_{vacuum}}{F_{medium}}\) iii. It is also called as specific inductive capacity or dielectric constant.

Answer»

i. Relative permittivity or dielectric constant is the ratio of absolute permittivity of a medium to the permittivity of free space. It is denoted as K or ε_r.

i.e., K or ε_r = ε/ε₀

ii. It is the ratio of the force between two point charges placed a certain distance apart in free space or vacuum to the force between the same two point charges when placed at the same distance in the given medium.

i.e., K or ε_r = \(\frac{F_{vacuum}}{F_{medium}}\)

iii. It is also called as specific inductive capacity or dielectric constant.

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