Give two characteristics of an insulator and explain its behaviour
Answers
Answer:
An insulator is a solid material whose inner electric charge does not drift freely, and therefore which does not conduct current under the impact of an electric field. Insulators are non-conducting materials. I.e. it resists electricity. It has great resistance value, usually in Mega ohms.
1) Thermal conductivity :
This is a physical unit, symbol lambda which characterizes insulation ability to conduct heat. Its unit is W / m / K. The material is an insulator when thermal conductivity is small.
2) Water permeability :
It is the ability to let the walls breathe. It is important that the moisture produced by the inhabitants of the house can escape through the walls to avoid the appearance of water stains and mold.
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Answer:
1. Insulator do not conduct it's electricity.
2.Insulators have large dielectric strength.