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Which mechanism primarily limits signal propagation distance in unshielded twisted pair cable?

A)Capacitive coupling inducing crosstalk
B)Skin effect causing increased resistance
C)Electromagnetic interference from nearby devices
D)Signal reflections due to impedance mismatch

💡 Explanation

When signals propagate, capacitive coupling between the unshielded wires allows energy transfer, resulting in crosstalk and signal degradation, limiting the propagation distance. Therefore, capacitive coupling is the main limiting factor, rather than skin effect, EMI or reflections, which cause attenuation over shorter distances and require different cable characteristics.

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