MHT CET 2022 Physics question

Not in JEE Advanced syllabus

Electrical conductivity of insulators is

(A)extremely smallCorrect
(B)exactly zero
(C)sometimes small and sometimes large
(D)extremely large

Answer: (A)

Solution

In insulators the valence band is completely filled, the conduction band is empty and the energy gap is large ( eV). Very few charge carriers can be excited across the gap at ordinary temperatures, so the conductivity is extremely

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Question ID VK-097098