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← ScienceWhich mechanism limits signal propagation speed through long copper coaxial cables?
A)Skin effect impedance increases reflection
B)Dielectric polarization increases capacitance✓
C)Oxidation increases core resistance
D)Microbends induce signal attenuation
💡 Explanation
When a high-frequency signal travels in a coaxial cable, the dielectric material between the conductors polarizes, causing capacitance, retarding signal propagation because polarization slows the advancement of the electromagnetic field. Therefore dielectric polarisation is the limiting factor, rather than skin effect, oxidation, or micro bends which influence other signal properties.
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