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Which mechanism influences electrical conductivity in doped silicon crystal?

A)Impurity atoms create mobile charge carriers
B)Phonon scattering increases electron mobility
C)Grain boundaries diminish carrier pathways
D)Fermi level aligns with valence band

💡 Explanation

Doping introduces impurities, and the increased quantity of charge carriers enhances total conductivity because the mechanism of increased "carrier concentration" allows for an increase in electrical current; therefore increased current flow, rather than decreased, is responsible.

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