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← ScienceWhich outcome occurs when a capacitor's dielectric thickness is critically thinned to enhance energy density?
A)Increased electron quantum tunnelling current✓
B)Reduced dielectric breakdown threshold
C)Elevated operating temperature sensitivity
D)Enhanced ion migration and recombination
💡 Explanation
Increased electron quantum tunnelling current occurs because reducing the dielectric thickness causes a higher probability of electrons tunnelling, across the insulating layer. Therefore energy is dissipated, rather than lower breakdown, which is limited by material.
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