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← ScienceWhich consequence results when electrons tunnel across the depletion region in an over-doped semiconductor diode?
A)Zener breakdown increases sharply.✓
B)Thermal runaway conditions stabilize.
C)Reverse current remains negligible.
D)Capacitance decreases proportionally.
💡 Explanation
Electron tunneling across the narrow depletion region under high reverse bias leads to Zener breakdown because quantum tunneling significantly increases reverse current rather than stability; therefore, Zener effect is prominent, rather than limited reverse current scenarios.
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