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← ScienceWhich mechanism limits maximum data propagation speed in a copper Ethernet cable?
A)Skin effect increasing resistance✓
B)Dielectric breakdown of insulation
C)Signal reflections at connectors
D)Crosstalk between adjacent wire pairs
💡 Explanation
When signal frequency increases in copper Ethernet cable, the skin effect localizes current flow to the conductor's surface because of self-inductance, increasing effective resistance and signal attenuation, thus limiting propagation speed. Therefore skin effect dominates, rather than dielectric breakdown, reflections, or crosstalk, which have different frequency dependencies.
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