E9F03 — Amateur Extra Class

E9F03 : Why is the electrical length of a coaxial cable longer than its physical length?
A Skin effect is less pronounced in the coaxial cable
B Skin effect is more pronounced in the coaxial cable
C Electromagnetic waves move faster in coaxial cable than in air
D Electromagnetic waves move more slowly in a coaxial cable than in air
Correct Answer: Electromagnetic waves move more slowly in a coaxial cable than in air