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← ScienceWhich outcome occurs when the Fermi level nears the conduction band edge in a lightly doped n-type semiconductor?
A)Increased free carrier concentration appears✓
B)Complete depletion region width increase
C)Band gap energy reduction starts
D)Enhanced electron-phonon interaction emerges
💡 Explanation
An increase in free carrier concentration occurs due to thermal excitation because the Fermi level indicates the probability of electron occupancy; therefore, more electrons populate the conduction band rather than remaining in valence bands due to lower energy gaps.
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