It’s true, electromagnetic waves do travel at a high percentage of the speed of light, however the drift electrons, the things that make the speaker vibrate ant the instantaneous audio frequency only travel at about one meter per hour. You could even say the speed of light isn’t relevant.
Coiling a zip cable will not really increase the inductance. The dipole magnetic field is essentially zero 5 conductor spacings away, so coiling will not enhance the magnetic field so inductance does not increase.
The propagation velocity of the cable is proportional to C/sqr(permittivity) for a constrained cable such as coax or stripline, a factor of 3 to 5 slower for widely spaced conductors. Even so, a fraction of lightspeed is kinda hoofing it.
However, the entities that do matter for signal settling time at the load is L and C of the cable, either lumped model (simplistic) or distributed (more accurate).
The equation is L*C=1034*relative dielectric coefficient with constrained cable, maybe five times that for spaced conductors.
Everybody understands how the effective L and C of a cable can slow down power delivery to the load.
John
The propagation velocity of the cable is proportional to C/sqr(permittivity) for a constrained cable such as coax or stripline, a factor of 3 to 5 slower for widely spaced conductors. Even so, a fraction of lightspeed is kinda hoofing it.
However, the entities that do matter for signal settling time at the load is L and C of the cable, either lumped model (simplistic) or distributed (more accurate).
The equation is L*C=1034*relative dielectric coefficient with constrained cable, maybe five times that for spaced conductors.
Everybody understands how the effective L and C of a cable can slow down power delivery to the load.
John
