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← ScienceWhich primary mechanism causes signal degradation in a coaxial cable at high frequencies?
A)Dielectric absorption converts energy to heat
B)Electromagnetic interference induces current
C)Skin effect increases conductor resistance✓
D)Impedance mismatch causes signal reflection
💡 Explanation
At high frequencies, the skin effect forces current to flow near the conductor's surface because of self-inductance generating opposing fields within the conductor, which increases effective resistance. Therefore skin effect causes signal degradation, rather than dielectric absorption, EM interference, or reflection which are governed by unrelated factors.
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