Statement I : At absolute zero the conductivity of semiconductor is infinite. \ Statement II : The

Question

Statement I : At absolute zero the conductivity of semiconductor is infinite. \ Statement II : The total number of free electrons in a semiconductor is less than that in a conductor.

Professor PC Thomas Classes · Answer

(d) : In a semiconductor, there are no free electrons at 0 K . The number of free electrons increases with increase in temperature because with increase in temperature the electron get sufficient energy to cross forbidden band and reach conduction band. But total number of free electrons in a semiconductor is less than that in a conductor.