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← ScienceWhich risk increases when a high-energy electromagnetic pulse couples rapidly across a long, unshielded transmission line?
A)Dielectric breakdown in line insulators✓
B)Increased skin effect energy losses
C)Enhanced corona discharge from conductors
D)Amplified waveguide mode propagation
💡 Explanation
Dielectric breakdown is more likely because the rapid increase in voltage stress from electromagnetic induction exceeds the insulator's breakdown strength, resulting in arcing between conductors, therefore insulation fails rather than higher thermal effects or changed field modes.
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