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Which outcome arises when a crystal lattice contains doping impurities?

A)Increased free carrier concentration
B)Enhanced phonon scattering
C)Reduced thermal expansion
D)Increased dielectric breakdown voltage

💡 Explanation

Increased free carrier concentration occurs because doping introduces extra electrons or holes via the mechanism of band gap modification. Therefore, electrical conductivity increases rather than decreasing, because of a greater number of charge carriers become available.

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