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How Does Polarised Dielectric Modify the Original External Field? - Physics

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How does polarised dielectric modify the original external field?

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Solution

The field causes a uniform polarisation P of the dielectric. This induces a net charge density. Thus, the polarised dielectric is equivalent to two charged surfaces with induced surface charge densities.

Hence, the field produced by these surface charges opposes the external field.

Concept: Dielectrics and Polarisation
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