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← ScienceWhich 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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