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← ScienceWhich process initiates current flow through a tunnel diode?
A)Quantum tunneling enhances electron transport✓
B)Thermal excitation overcomes barrier voltage
C)Impurity diffusion raises carrier density
D)Recombination diminishes depletion region size
💡 Explanation
Quantum tunneling allows electron passage even when energy is lower than the potential barrier because the wave function penetrates the barrier, therefore current flows at lower voltages rather than requiring thermal excitation to surmount the barrier.
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