Question

Classify materials on the basis of electrical conductivity

Answer 1

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.