Thursday 22 September 2011

DIELECTRIC SUBSTANCES AND THEIR POLARIZATION

There are many dielectric substances but following are best dielectric substances.
· A non-conducting material is called a dielectric.


· The dielectric does not possess free electrons like a conducting material.

· Introduction of a dielectric between the two parallel plates of a capacitor considerably increases the capacitance of a capacitor.

· Dielectric materials are of two types: ( 1 ) Polar and ( 2 ) Non-polar.

· The atoms of a dielectric ( like HCl, H2O ) that have permanent dipole moment is called a polar dielectric.

· The atoms of a dielectric ( like H2, O2 ) that do not have permanent dipole moment is called a non-polar dielectric.

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