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Which mechanism causes current flow despite depletion region width?

A)Quantum tunneling allows carrier penetration
B)Thermal diffusion overcomes energy barrier
C)Recombination introduces mediating energy states
D)Impact ionization generates minority carriers

💡 Explanation

Quantum tunneling enables electrons to traverse the barrier, because electrons have a probability of passing through a classically forbidden region; therefore, charge carriers tunnel rather than being blocked, because the depletion region is finite.

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