Cylinder Toward End of Cable Cord
We’ve all used cable or power cords of some kind and notice a big cylinder-shaped lump toward the end. Most people don’t know that those are actually called chokes or ferrite cores. They are simply magnetic iron oxide that helps to prevent any high-frequency electromagnetic interference. An example of this kind of interference is when your cell phone gets too close to a speaker and you get that weird noise interrupting your call. That’s why we have those big cylinders on cable cords.
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