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Which consequence occurs when specific impurities alter band structure?

A)Fermi level shifts in semiconductor
B)Increased lattice vibrations decrease mobility
C)Dielectric breakdown voltage becomes erratic
D)Material achieves near perfect insulation

💡 Explanation

The Fermi level shifts because doping affects the electron population near the conduction band/valence band edge due to the mechanism called impurity scattering, therefore moving its potential rather than alternatives like lattice changes that affect mobility under voltage.

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