Physics-(general)
NEET Physics (general) MCQ Question
Type: MCQ-numerical-Hard-Class 12
Considering a semiconductor with a small band gap (E g < 3 eV) at room temperature, what is the primary reason for the conduction of electricity?
A
Thermal excitation of electrons from the valence band to the conduction band.
B
Overlapping of conduction and valence bands.
C
Presence of free electrons in the conduction band at absolute zero.
D
Electrons being injected from an external source.
Correct Answer
Option A
Detailed Explanation
According to the context, in a semiconductor with a small band gap, thermal energy at room temperature can excite electrons from the valence band to the conduction band, allowing them to conduct electricity.
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