What is a dielectric? State its two types. Give two examples in e… - Vidyadip

Question

What is a dielectric? State its two types. Give two examples in each case,

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Answer

A dielectric is an electrical insulator i.e., a nonconducting material, that can be polarised by an applied electric field which slightly displaces the positive and negative charges of each molecule. A dielectric can sustain a high electric field up to a certain limit. An ideal dielectric has no free charges.
Important commercial dielectrics are of two types, polar and nonpolar.
Examples:
Polar dielectrics : Silicones, halogenated hydrocarbons.
Nonpolar dielectrics : (1) Solid: Ceramics, glasses, plastics (polyethylene, polystyrene, etc.) mica, paper. (2) Liquid : Mineral oils.

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