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← ScienceWhich material alteration enables transistor switching via band gaps?
A)Controlled impurity doping profiles✓
B)Increased crystalline grain boundaries
C)Induced mechanical tension
D)Elevated operating temperature
💡 Explanation
Controlled doping alters the semiconductor's band structure using Fermi level adjustment in the depletion regions, which controls potential. Because free carriers change, therefore allows conductive and insulated operational states; rather than influencing parameters directly.
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