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← ScienceWhich outcome prevents thermionic emission at low operational temperatures?
A)Electrons lack sufficient thermal energy✓
B)Material work function decreases linearly
C)Quantum entanglement induces repulsion
D)Conduction band gap widens significantly
💡 Explanation
Insufficient thermal energy inhibits electrons overcoming the material's work function hindering thermionic emission, because lower energies mean the mechanism, thermal excitation, which cannot boost enough electrons. Therefore, emission is limited, rather than experiencing work function or quantum entanglement influences, which affect different emission facets.
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