Discussion
What happens to a transistor's beta after emitter-base breakdown?
Answer: C
Avalanche in the emitter junction damages the surface, so beta falls permanently even if the current was limited and the device still functions. That silent degradation is what makes the rating so treacherous: nothing fails outright, but a circuit's gain drifts and the cause is invisible. Any stress that degrades rather than destroys is worth designing against explicitly, because it will not announce itself.
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