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Which outcome occurs when excessive voltage gradients induce dielectric breakdown in underground shielded power cables?

A)Localized plasma discharge initiation
B)Increased cable compressive strength
C)Enhanced magnetic field containment
D)Reduced cable inductive reactance

💡 Explanation

Localized plasma discharge is initiated because, when the electric field exceeds the dielectric strength, electron avalanche occurs, triggering ionization within voids. Therefore, a plasma discharge starts, generating heat and further damaging the insulation, rather than improved mechanical or signal integrity under normal usage conditions.

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