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← ScienceWhich mechanism causes dielectric breakdown when excessive voltage is applied to a ceramic capacitor?
A)Ionic migration creating conductive pathways✓
B)Electromagnetic interference increasing ESR
C)Piezoelectric deformation inducing microcracks
D)Thermal expansion causing plate delamination
💡 Explanation
When excessive voltage is applied, ionic migration occurs because the electric field forces ions to move, creating conductive filaments that short-circuit the dielectric. Therefore migration leads to breakdown, rather than EMI, deformation or delamination which arise from completely different failure mechanisms.
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