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← ScienceWhich risk increases in a doped semiconductor when thermal energy exceeds the band gap?
A)Intrinsic carrier concentration increases✓
B)Fermi level shifts towards valence
C)Avalanche breakdown voltage elevates
D)Electron mobility reaches saturation velocity
💡 Explanation
The intrinsic carrier concentration increases because electrons gain enough thermal energy to jump the band gap via Thermal Excitation. Therefore, the material behaves less like a semiconductor, rather than maintaining controlled conductivity from doping at lower temperatures.
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