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← ScienceWhich risk increases when a high-frequency signal propagates inside a dielectric-filled waveguide?
A)Uncontrolled harmonic oscillation occurs
B)Spurious mode excitation is amplified
C)Skin effect losses dominate
D)Dielectric breakdown risk escalates✓
💡 Explanation
Dielectric breakdown risk increases because *impact ionization* causes cumulative energy transfer to dielectric molecules. Therefore the electric field intensity increases rather than harmonic modes due to field confinement.
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