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← ScienceWhich risk increases when a power transmission line's insulator exceeds capacitance limits?
A)Resonant harmonic overvoltage develops✓
B)Corona discharge intensity decreases
C)Dielectric breakdown rate lessens
D)Line impedance matching improves
💡 Explanation
Resonant harmonic overvoltage develops because increased capacitance causes lower impedance at harmonic frequencies, triggering uncontrolled resonance if inductance interacts; therefore, overvoltage is the risk, rather than improvements, because limits protect line insulation integrity.
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