What are the polar and nonpolar …
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Polar dielectrics
A polar molecule which has permanent electric dipole moment ({tex}\vec p{/tex}) in absence of electric field are called polar dielectrics. In these substances the possibilities of centre coinciding of positive and negative charges are zero. Polar molecules are randomly oriented. e.g. Water, alcohol, HCl, NH3.
Non-polar dielectrics
A non-polar molecule having zero dipole moment in its normal state are called non-polar dielectrics. In these substances the centres of both positive as well as negative charges coincide.
Non-polar molecules have symmetrical shapes. e.g. Any non-conducting material.
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