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← TechnologyWhich consequence results when impedance mismatches concentrate in a buried electrical power distribution system?
A)Harmonic resonance destabilizes grid voltage
B)Localized overheating reduces cable lifespan✓
C)Electromagnetic interference inhibits communication
D)Dielectric breakdown stalls power supplies
💡 Explanation
Localized overheating occurs because standing waves from impedance mismatches increase current density via constructive interference of signals; therefore, heat increases insulation breakdown. Rather than harmonic resonance, mismatch concentrates power dissipation at specific locales due to signal reflection.
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