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Which outcome results as crystalline silicon purity increases to achieve intrinsic behavior?

A)Increased electron-hole recombination rate
B)Reduced thermal conductivity dominates
C)Decreased resistivity controls conduction
D)Increased effective mass impairs mobility

💡 Explanation

Decreased resistivity occurs because reduced lattice defects means decreased electron scattering during drift; this increases mobility. Therefor, resistivity decreases rather than increases when purity increases, despite a reduction only in carrier density, not thermal behavior directly.

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