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Which mechanism causes stray oscillating current in high-voltage transmission lines when experiencing capacitive coupling?

A)Parasitic capacitance forms tank circuit
B)Skin effect enhances resistance
C)Corona discharge reduces insulation
D)Ferroresonance induces transformer saturation

💡 Explanation

Parasitic capacitance between conductors forms a tank circuit with line inductance; resonance causes oscillating currents. Therefore, tank circuit formation explains the observation, rather than increased resistance or insulation breakdown because these effects don't inherently create oscillation.

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