Classify materials on the basis of electrical conductivity
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On the basis of conductivity ,the materials can be classified in to following categories:-
(a) Conductors:- These are those materials whose electrical conductivity is very high. Conductors conduct charges very easily . For super-conductor , the value of electrical conductivity is infinite.
Examples. Copper,Silver.Aluminum,Tungsten etc.
(b) Semiconductors:- They are those materials whose electrical conductivity lies in between insulators and conductors . Semiconductors can conduct charges but not so easily as in case of conductivity.
Examples. Germanium.Silicon etc.
(c) Insulators:- These are those materials whose electrical conductivity is either very very small or nil. Insulators do not conduct charges.
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