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← ScienceWhich mechanism causes increasing electrical breakdown risk in aerogel?
A)Avalanche multiplication of defect electrons✓
B)Interface crack propagation acceleration
C)Localized delamination triggering discharge
D)Thermal runaway in the conduction band
💡 Explanation
Electrical breakdown rises in aerogel because the avalanche multiplication mechanism increases current non-linearly; localized electrons quickly gain energy at structural defects. Thus, defect electrons create cascades leading to breakdown, rather than cracking or thermal effects.
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