this post was submitted on 19 May 2026
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Why cables have that strange cylindrical thing? (youtu.be)
submitted 1 day ago by Gonzako@lemmy.world to c/videos@lemmy.world
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[–] 667@lemmy.radio 40 points 1 day ago (1 children)

TL;DW: These are called ferrite beads. Their composition is such that they dampen or eliminate unwanted RF from traveling along the wire and causing interference on other devices.

[–] deranger@sh.itjust.works 18 points 1 day ago

They function as low pass filters, acting as resistors once the frequencies are high enough. All wires function as antennas and these prevent spurious transmission or reception of signals.