Physics-(general)
NEET Physics (general) MCQ Question
Type: MCQ-conceptual-Hard-Class 12
In a semiconductor, if the distance between atoms in the crystal lattice is such that the energy band splits into two bands separated by an energy gap E_g, which of the following best describes the occupancy of these bands at absolute zero temperature?
A
The valence band is completely filled, and the conduction band is empty.
B
Both the valence and conduction bands are partially filled.
C
The conduction band is completely filled, and the valence band is empty.
D
Both the valence and conduction bands are completely empty.
Correct Answer
Option A
Detailed Explanation
At absolute zero temperature, the valence band in a semiconductor is completely filled by the 4N valence electrons, while the conduction band is empty, as described in the NCERT context.
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