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← ScienceWhich mechanism causes increased current leakage across a ceramic capacitor at elevated operating temperature?
A)Increased oxide layer ionic mobility✓
B)Piezoelectric crystal fracture propagation
C)Electrode migration through polymer matrix
D)Dielectric saturation reducing breakdown voltage
💡 Explanation
When temperature increases, ionic mobility within the ceramic oxide dielectric material increases because increased thermal energy overcomes energy barriers for ion movement, leading to more charge carriers and higher leakage. Therefore ionic mobility causes leakage increase, rather than fracture, migration, or dielectric saturation which arise from alternative degradation modes.
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