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← ScienceWhich mechanism causes signal distortion when digital data is transmitted through a long coaxial cable?
A)Skin effect increasing resistance at higher frequencies✓
B)Capacitive coupling inducing noise from nearby cables
C)Electromagnetic interference from external sources
D)Signal reflection due to impedance mismatch
💡 Explanation
When transmitting digital signals through coaxial cable, the skin effect causes higher frequencies to propagate only on the outer surface, increasing resistance and attenuating those frequency components, resulting in distortion. Therefore, the skin effect causes resistance increase, rather than capacitive coupling, external interference, or reflections, which result from different effects.
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