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← ScienceWhich risk increases when the dielectric strength of a transmission line insulator is locally exceeded?
A)Increased signal propagation time
B)Decreased characteristic impedance
C)Arcing and subsequent flashover✓
D)Reduced magnetic field coupling
💡 Explanation
When the dielectric strength is locally exceeded, ionization of the air occurs, triggering avalanche breakdown which causes arcing and a flashover. Therefore, significant current flow occurs, rather than a gradual signal loss, because the insulator is compromised.
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