Question

give two characteristics of an insulator that explains it's behaviour​

Answer 1

Answer:

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Explanation:

Insulators possess a high resistivity and low conductivity. Their atoms have tightly bound electrons that do not move throughout the material. Because the electrons are static and not freely roaming, a current cannot easily pass.

Answer 2

Answer:

Property 1: In an insulator, the valence electrons are tightly held together. They do not have free electrons to conduct electricity.

Property 2: The ability of the material to not allow the electric current to pass through it is called electrical resistance. The resistance of an insulator per unit cross-sectional area per unit length is called resistivity. Insulators have very high resistivity. For example, insulators like glass have a resistivity value as high as 1012 Ωm. The resistance of the insulator is considerably reduced in the presence of moisture and when there is an increase in temperature.

Property 3: Insulators have large dielectric strength. The dielectric strength is the maximum electric field that the insulator can withstand without undergoing electrical breakdown and becoming electrically conductive.

Property 4: Good insulators have a high air permeability (the ability of the material to allow air to flow through its pores) since air itself is an insulator.