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← ScienceWhich mechanism restricts electron movement when energy is below band?
A)Fermi level exclusion✓
B)Bragg reflection interference
C)Phonon scattering resonance
D)Quantum tunneling suppression
💡 Explanation
Fermi level exclusion inhibits electron movement because electrons lack available states within the valence band. Therefore, electrons cannot move freely; rather than a consequence of scattering or tunneling which require higher energy transitions.
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