Question

Define the term
dielectric constant. Give its S.I.unit.

Answer 1

Dielectric constant is a dimentionless quantity which defines the ratio of the permitivity of a substance to the permitivity of free space. It is an expression of the extent to which a material concentrates electric flux.

$k=\frac{\epsilon }{{\epsilon }_0}$

Here,

$k$- Dielectric constant

$\epsilon$- permitivity of a substance

${\epsilon }_0$- permitivity of free space