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← TechnologyWhich outcome occurs when back-biasing an LED beyond Vr?
A)Reverse avalanche breakdown occurs✓
B)Radiative recombination increases sharply
C)Forward current flow is enabled
D)Sub-bandgap light emission initiates
💡 Explanation
Reverse avalanche breakdown occurs because exceeding the reverse breakdown voltage of the LED's PN junction causes a large current flow due to impact ionization. Therefore, the LED degrades rather than emitting light, under this failure condition.
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