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Which outcome occurs when donor impurities are introduced into a semiconductor's crystal lattice?

A)Increased electron concentration in conduction band
B)Reduced hole concentration in valence band
C)Decreased band gap energy overall
D)Pinning the Fermi level at midgap

💡 Explanation

Introducing donor impurities into a semiconductor results in increased electron concentration in the conduction band because the dopants contribute extra electrons via *n-type doping*; therefore the electron population will be significantly higher rather than affecting hole availability directly.

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