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← ScienceWhich mechanism causes signal attenuation in long submarine cables?
A)Dielectric absorption by cable insulation✓
B)Resistive skin effect dominates impedance
C)Eddy currents from metallic shielding
D)Modal dispersion creates signal interference
💡 Explanation
Dielectric absorption causes attenuation because the insulation acts as a capacitor, storing charge and releasing it slowly. This energy loss is called dielectric loss. Therefore, the signal weakens. Rather than metallic loses, dielectric absorption dominates.
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