Conductors
In conductors, electric current can flow freely. Metals are mostly conductors. Metals such as Gold, silver, copper are conductors. And all the non-metal are not non conductors. Some non- metals like graphite and the human body are also good conductor. They have very low resistance and high conductance. The resistivity of a conductor will never be ZERO(except only one metal). The outermost electron in a conductor is loosely bounded. so, It can be easily moved throughout the material(conductor) by giving current to it.
Silver - 1.59 x 10 -8 ohm m
Copper - 1.7 x 10 -8 ohm m
Aluminum - 2.65 x 10 -8 ohm m
Resistivity of conductors :
Gold - 2.44 x 10 −8 ohm mSilver - 1.59 x 10 -8 ohm m
Copper - 1.7 x 10 -8 ohm m
Aluminum - 2.65 x 10 -8 ohm m
Insulators
In insulators, electric current can't flow freely. Non-metals are mostly insulators. Non-metals such as glass , mica are insulators.They have extremely high resistance and very low or nil in conductance.The outermost electrons in the insulators are tightly bounded. so, It can't be easily moved throughout the material(insulator) by giving current to it.Resistivity of inductors :
Glass - 10 12 ohm m
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