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Which outcome occurs as electrons approach a semiconductor's depletion region?

A)Quantum tunneling probability exponentially increases
B)Drift velocity linearly decreases to zero
C)Recombination rate becomes independent of doping
D)Band gap widens at a constant gradient

💡 Explanation

Quantum tunneling causes electrons to potentially tunnel through the depletion region, because the electron's wave function allows it to pass through a potential barrier. Therefore, tunneling propability increases the closer an electron moves near the depletion region, rather than a linear decay slowing motion.

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