What is electric susceptibility? - Vidyadip

Question

What is electric susceptibility?

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Answer

In a linearly isotropic dielectric placed in a uniform electric field, the electric polarization $\vec{P}$ is directly proportional to the electric field intensity $\vec{E}$ inside the dielectric.
$
\therefore \vec{P}=\chi_e \varepsilon_0 \vec{E}
$
where the proportionality constant $\chi_{e,}$ a positive quantity, is called the electric susceptibility of the dielectric.
[Note $: \chi_e$ is dimensionless. $SI$ units of $P$ and $E$ are $C / m ^2$ and $N / C$ ]

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