Radio Amateur Quiz Canadian License

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Question A-007-002-009

Why is the physical length of a coaxial cable shorter than its electrical length?

Correct Answer

RF energy moves slower along the coaxial cable than in air

Explanation

The dielectric material in a coaxial cable slows down the propagation of the RF wave compared to its speed in free space (air or vacuum). Therefore, a physical length of cable corresponds to a longer electrical length (in wavelengths).

Warning: Generated by AI