What are the lumps on computer cables?

The ferrite bead is positioned at the ends of cables because their job is to make noise/interference from a certain device and turn it into heat. And closer positioning to the source stops the cable from turning into a receiver early on, giving the lumps/bead a purpose.

What is the thing at the end of cable?

The cylinder is called a ferrite bead, ferrite core, or, more generally, a choke. Cables can act like unintentional antennas, broadcasting electrical interference (“noise”) or picking it up.

What is the bulge on my USB cable?

This lump is usually found on one side of the cable. So what is it? It’s a ferrite core that’s used to reduce the electromagnetic interference from the cable, which acts as an ‘unintentional’ antenna, and other devices. The atoms in the core align in such a manner that they cancel the noise.

Is a ferrite bead necessary?

The ferrite bead can help prevent the generation of unwanted radio transmissions. If the input to the cable generates unwanted high frequency noise, the tolerable solution to the problem may be the addition of a ferrite bead, rather than a redesign of the input to limit the generation of the high frequency noise.

What does a ferrite choke do?

When a ferrite bead choke is placed on the power line connecting to an electronic device, it removes any spurious high frequency noise present on a power connection or that is output from a DC power supply. As DC current increases, a ferrite bead will “saturate” and lose inductance.

Can I remove ferrite bead?

If it’s made of iron and its necessity is in doubt, you might consider eliminating it from a balloon or kite rig. The ferrite beads near the small plug on the USB cables that came with the PLOTS visible/IR camera kit are easy to remove.

Why is there a bump on my charger?

It looks to pose a fire hazard, plus potential phone damage. The charger itself is likely ok if you have another cable to use. Definitely a sign of bad cable, especially with the black spots (possible signs of shorting between wires).

What are ferrite cores used for on cables?

A ferrite cable core is designed to clean common mode noise (signal) generated from either a signal line or power cable. How do Ferrite Cores Work? Ferrite cores are used to suppress electromagnetic emissions by blocking low-frequency noise and absorbing high-frequency noise. This avoids electromagnetic interference.

Where do ferrite cores go?

Cable ferrites are normally situated near the cable termination where it exits the electronic enclosure. In fact, you might have to install a suppressor on both ends if the cable connects two separate enclosures containing radio frequency sources.