why are there cables at different speeds if they are all made of copper?
In: Physics
The “speed” of a copper cable on a short run (less than 50ft) isn’t particularly related to the speed of a signal that passes through. It’s more related to how many signals can be passed through per second without loss. If you add more individual lines in the cable or increase how many signals you send per second, then you increase the speed. But if there’s interference between the lines or if the receiving device can’t read the signals as fast as they’re being sent, then the signal you’ll receive will be garbled.
In a physical example: if you’re trying to get 2000 cars from one side of a city to the other, increasing the top speed of the cars won’t help. Increasing the number of avenues and reducing the number of crashes (interferences) is the best way to do so.
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