Comment on Why cables have that strange cylindrical thing?
667@lemmy.radio 1 week ago
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 1 week 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.