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Suppose a transient voltage spike exceeds a Zener diode's reverse breakdown voltage. Which outcome relating to component failure occurs because of this?

A)Thermal runaway causes junction degradation
B)Increased capacitance filters high frequencies
C)Decreased resistance permits forward current
D)Reduced depletion width lowers bias voltage

💡 Explanation

The Zener diode experiences failure because in exceeding the breakdown voltage, the avalanche effect initiates thermal runaway, destroying the P-N junction rather than simply clamping the voltage. Therefore causing degradation; rather than acting beneficially.

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