What do you mean by valence,conduction and forbidden bands? – InterviewSolution

1.	What do you mean by valence,conduction and forbidden bands?
Answer» In insulators theelectronsin thevalence bandare separated by a largegapfrom theconduction band, in conductors like metals thevalence bandoverlaps theconduction band, and in semiconductors there is a small enoughgapbetween thevalenceandconduction bandsthat thermal or other excitations can bridge thegap.

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