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← ScienceWhich risk increases when a high-frequency electromagnetic wave propagates through a dielectric?
A)Dielectric breakdown field strength decreases✓
B)Increased impedance matching at interfaces
C)Decreased capacitive reactance diminishes coupling
D)Lower dissipation factor reduces heat generation
💡 Explanation
A strong EM field exceeding the dielectric strength causes dielectric breakdown because the electric field accelerates electrons, ionizing the material via impact ionization raising conductivity; therefore, breakdown becomes more probable, rather than lower heating because the current surge creates conductive hot plasma.
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