Do they make the signal faster?
What could they be protecting the signal from?
Why do only some USB cables have them?
Do they really work?
In: Technology
1. No. They don’t make the signal faster
2. All wires are natural antennas. If a wire carries a signal, it can also radiate radio waves. As an antenna it can also pick up radio waves. The cylinders are ferrite beads. They are used to suppress this spurious signal or radiation.
3. Some beads are embedded in the USB connector casing itself, so you may not see them.
4. Yes, they do. Although you won’t really notice it when it is working.
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