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← ScienceWhich consequence results when intrinsic defects narrow bandgaps?
A)Increased free electron concentration✓
B)Lowered material melting temperature
C)Increased phonon scattering events
D)Reduced coefficient of thermal expansion
💡 Explanation
Increased free electron concentration occurs when intrinsic defects narrow the band gap; this is defect-induced band gap narrowing reducing the excitation energy to boost electron availability. Therefore n-type character increases, rather than reduced melting which depends on bond strength.
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