Arizona Drivers Permit Practice Exam Guide

What is skin effect in AC conductors?

The tendency of alternating current to flow mostly near the outer surface of a conductor The degradation of the outer wire jacket due to UV light The process of stripping the insulation off a wire The reaction of copper wire when exposed to moisture

Correct Answer:

The tendency of alternating current to flow mostly near the outer surface of a conductor

Explanation:

The skin effect causes high-frequency AC to concentrate near the surface of the conductor, reducing the effective cross-sectional area and increasing resistance at high frequencies.

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