Ferrite coresare used in electronic inductors, transformers, and electromagnetswhere the high electrical resistanceof the ferrite leads to very low eddy currentlosses. They are commonly seen as a lump in a computer cable, called a ferrite bead, which helps to prevent high frequency electrical noise (radio frequency interference) from exiting or entering the equipment. Ferrite particles are also used as a component of radar-absorbing materials or coatings used in stealthaircraft and in the absorption tiles lining the rooms used for electromagnetic compatibilitymeasurements.Most common radio magnets, including those used in loudspeakers, are ferrite magnets. It is a common magnetic material for electromagnetic instrument pickups.
