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Which effect arises when dopants distort silicon's lattice structure?

A)Increased free carrier concentration
B)Spontaneous electron-hole recombination
C)Enhanced phonon scattering rates
D)Suppressed thermal conductivity overall

💡 Explanation

An increased free carrier concentration occurs because increased doping introduces more electrons or holes into the crystal lattice due to the mechanism of *impurity ionization*. Therefore, conductivity increases because of higher carrier numbers, rather than decreased carrier mobility/number.

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