Which risk increases when operating a long, unterminated high-voltage transmission line?

A)Corona discharge increases dielectric breakdown

B)Capacitive coupling generates voltage surges✓

C)Ohmic losses cause thermal runaway

D)Ground loops create circulating currents

💡 Explanation

Because capacitance exists along transmission lines, unterminated lines experience standing waves causing a voltage maximum at the open end. Therefore, capacitive coupling generates large surges rather than corona because of the distributed capacitance effect.

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Which risk increases when operating a long, unterminated high-voltage transmission line?

💡 Explanation

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