How are electromagnets used in radios?
They are used in loudspeakers to replicate sounds-coil type. they are also used in coiltype antennas in the base of receivers such as old emersons. this was an adveritisng ploy that the radios had(aerial eliminators) and did not need unsightly or visible antennas. we had an old zenith with base coil antenna. Also coils have a variety of applicaitons in tuning and band spread. Any electrical coil is essentially a form of electro-magnet.
