Answer :


Given: energy band gap,


For silicon,


For diamond,


Also, we know that concentration of conduction electron(n) is


proportional to e–ΔE/2kT



For silicon,


For diamond,


We want,


Since, is very large, due to which the value of is in the negative power of 51, thus almost zero conduction electrons will be there in the diamond. Due to this diamond is an insulator.


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