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Class 10 Class 12

Electrostatic Potential and Capacitance

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Dielectrics and Polarisation

Dielectrics are non-conducting substances. In contrast to conductors, they have no (or a negligible number of ) charge carriers.

Example of the dielectric materials are: Mica, glass, plastics, and the oxides of various metals.

The dipole moment per unit volume is called polarisation and is denoted by P. For linear isotropic dielectrics,

PE = χ

where χe is a constant characteristic of the dielectric and is known as the electric susceptibility of the dielectric medium.