Coaxial cable

How does signal propagate in a coax cable. Is it in the form of EM waves or in the form voltage/current?

magnetra

The EM wave is actually generated due to the voltage and current applied to the transmission line (coaxial cable in this case).

So when you apply a voltage to the TL the current passes through it and an EM wave is generated.

I hope this was helpful :)

The mode is TEM (transverse electric and magnetic) The propagation is in the space between the conductors. The RG in the US military cable designators stands for radio guide.