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← ScienceWhich outcome impairs transistor switching in semiconductors when thermal load changes band structure?
A)Reduced free carrier concentration, lower current✓
B)Increased phonon scattering, amplified voltages
C)Enhanced quantum tunneling, spurious signals
D)Localized Cooper pair formation, lower resistance
💡 Explanation
Reduced carrier concentration limits switching speed because increased thermal energy induces band gap narrowing via electron-phonon interactions, therefore reducing electron availability rather than enhancing scattering or tunneling, which requires different conditions.
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