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← ScienceWhich consequence occurs when a semiconductor's band gap narrows?
A)Increased sensitivity to thermal excitation✓
B)Reduced device operating voltage threshold
C)Higher resistance to reverse breakdown
D)Enhanced radiative recombination efficiency
💡 Explanation
Increased sensitivity to thermal excitation arises because smaller band gaps allow thermally excited electrons to more easily jump to the conduction band, therefore conductivity increases due to this mechanism, rather than higher breakdown voltage.
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