Which mechanism impairs signal transmission when electromagnetic fields exceed dielectric strength in coaxial cable?

💡 Explanation

When electromagnetic fields surpass the dielectric strength, dielectric breakdown occurs because the insulator material ionizes, creating a conductive path followed by high current discharge across electrodes, this leading to internal sparks disrupting signal carrying abilities. Therefore spark discharge resulting dat corruption, rather than other options requiring heating, impedance changes, or rising inductance.

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