MHT CET Physics question

Not in JEE Advanced syllabus

In semiconductors at a room temperature [MHT-CET 2023]

(A)The valence band is completely filled
(B)The valence band is partially empty and the conduction band is partially filledCorrect
(C)The valence band is completely filled and the conduction band is partially empty
(D)The conduction band is completely empty

Answer: (B)

Solution

At room temperature some electrons are thermally excited across the small gap, so the valence band is partially empty

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Question ID VK-075076