What is a linear isotropic dielectric?

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(B) linear isotropic dielectric is a material in which the induced polarization $P$ is directly proportional to the applied electric field $E$, such t

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$A$ material where the polarization is directly proportional to the electric field and the same in all directions.

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(B) linear isotropic dielectric is a material in which the induced polarization $P$ is directly proportional to the applied electric field $E$, such that $P = \chi_e \epsilon_0 E$, where $\chi_e$ is the electric susceptibility.It is called 'linear' because the polarization depends linearly on the electric field.It is called 'isotropic' because the dielectric properties (like susceptibility) are the same in all directions within the material.

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