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What is meant by polarisation in electromagnetism? Give the dimension (or unit) of polarisation P. In...

What is meant by polarisation in electromagnetism? Give the dimension (or unit) of polarisation P.

In a linear dielectric material with relative permittivity, the electric displacement field’s only non-zero component is the x-component and it can be written as

D=Dox2

where Do is a constant. Find the expression of volume free charge density and volume polarisation charge density.

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