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Which outcome occurs within a silicon crystal as temperature decreases, leading to lower resistance?

A)Increased carrier mobility (drift)
B)Decreased electron-phonon scattering
C)Reduced point defect concentration
D)Enhanced grain boundary conductivity

💡 Explanation

Decreasing temperature reduces lattice vibrations; therefore the electron-phonon scattering decreases drastically in single crystal silicon, because charge carriers travel more easily through the solid because there are fewer obstacles for momentum transfer, rather than enhanced grain boundary effects.

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