MHT CET 2023 Physics question

Not in JEE Advanced syllabus

In semiconductors at room temperature,

(A)the valence band is completely filled
(B)the conduction band is completely filled
(C)the conduction band is partially filled and valence band is partially emptyCorrect
(D)the valence band is completely filled and the conduction band is partially filled

Answer: (C)

Solution

At absolute zero an intrinsic semiconductor has a completely filled valence band and an empty conduction band. At room temperature, thermal energy lifts some electrons across the small energy gap into the conduction band, so the conduction band becomes partially filled and the valence band is left partially empty (the

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Question ID VK-098286