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Dielectric Polarization
ABSTRACT Contrary to conductors in which the charges are free to move anywhere within the material, in dielectrics, all the charges are attached to specific atoms or molecules. However, these bound charges could be displaced by a small amount under the action of an external electric field. Many dielectric materials have permanent dipoles that get aligned in the direction of the external electric field more and more as the strength of the external electric field is increased. The cumulative effect of such displacements of charges and/or alignments of dipoles determines the characteristics of dielectric materials. This chapter discusses the mechanisms by which a dielectric material gets polarized, that is, a dielectric ...
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