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← ScienceWhich outcome occurs when introducing impurities near the conduction band?
A)Increased free carrier concentration results✓
B)Decreased lattice vibration amplitudes results
C)Reduced grain boundary electron scattering
D)Enhanced thermal conductivity material results
💡 Explanation
Introducing impurities near the conduction band causes increased free carrier concentration, arising from the **doping effect**. Increased carriers enhance conductivity because electrons populate the conduction band rather than requiring thermal excitation, therefore increasing conductivity rather than influencing lattice vibration.
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