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Which failure occurs when a high voltage DC transmission line charges an underground cable's capacitance?

A)Dielectric breakdown across cable insulation
B)Increased skin effect within the conductor
C)Corona discharge around support structures
D)Ferranti effect inducing voltage drops

💡 Explanation

Dielectric breakdown can occur because charging the cable capacitance causes a high electric field stress across the insulator exceeding its breakdown strength. This results in insulation failure, rather than skin effect or corona which relate AC-specific phenomenon.

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