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← ScienceWhich electrical behavior occurs when a semiconductor’s impurity increases?
A)Increased free carrier concentration results✓
B)Band gap energy increases dramatically
C)Dielectric resistance sharply increases instead
D)Phonon scattering becomes essentially inhibited
💡 Explanation
Increased impurity concentration enhances doping, augmenting the free carrier generation via band bending. This increases conductivity because the availability of electrons or holes is elevated rather than decreasing the band gap, changing resistance, or inhibiting phonon scattering.
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