What are the classification of materials according to electrical conductivity?

Question

What are the classification of materials according to electrical conductivity?

Answer 1

insulators, resistors, conductors

Answer 2

*Classification of materials by conductivity

A conductor such as a metal has high conductivity.

An insulator like glass or a vacuum has low conductivity.

The conductivity of a semiconductor is generally intermediate, but varies widely under different conditions, such as exposure of the material to electric fields or specific frequencies of light.

*The degree of doping in solid state semiconductors makes a large difference in conductivity. More doping leads to higher conductivity. The conductivity of a solution of water is highly dependent on its concentration of dissolved salts and sometimes other chemical species which tend to ionize in the solution. Electrical conductivity of water samples is used as an indicator of how salt-free or impurity-free the sample is; the purer the water, the lower the conductivity.

Answer 3

That must be conductors,insulators,semi conductors.

Answer 4

Superconductors, conductors, semi-conductors, insulators.

However, as conductivity is just one huge sliding scale, it is more useful to use a numerical value for condictivity, which is defined as the recipricol of a substances resistivity.