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What is used as a surrounding for the solid center core in a coaxial cable?

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What is used as a surrounding for the solid center core in a coaxial cable?

(a) Plastic dielectric

(b) Ceramic

(c) Metal

(d) Wood

I had been asked this question in final exam.

The origin of the question is Transmission Line Basics topic in section Transmission Lines of Avionics

1 Answer

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The correct choice is (a) Plastic dielectric

Explanation: The coaxial cable consists of a solid center conductor surrounded by a dielectric material, usually a plastic insulator such as Teflon. Outside the insulation, there is a second conductor made of fine wires.

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