An electromagnet is any object that is converted into a magnet when electric current is passed through the object. The object loses its magnetic properties once the electric current ceases to be transferred through the object. Electromagnets are useful in various areas.
Traditional television sets use an electromagnet to power the cathode ray tube. The electromagnet directs the beaming of electrons, which in essence illuminates the television.
Before the advent of LCD and plasma, the electromagnet was an essential part of computer monitors. The electromagnet bends the electrons when they pass through the screen, which is how the image on the screen is prepared.
Electromagnets are used in automobiles. The electromagnet is essential to the starter motor. Also, the ignition coil is an enhanced electromagnet. Electromagnets are used in the self-closing mechanism found in some automobile doors.
Electromagnets are used in many motors. Electric motors have an electromagnet as an integral part of their circuitry. Electromagnets are used in ceiling fans, in the fans installed inside computers and in generators.
If you have ever used a loudspeaker, you have heard an electromagnet in use. If you have an MP3 player or another portable audio device and use earphones to listen to music, you have used an electromagnet. An electromagnet draws the speaker diaphragm, allowing the music to be played.
In scrapyards, electromagnets lift cars and other magnetic objects.
Fire Doors and Automatic Doors
Fire doors and doors that closes automatically both use electromagnets.
Electromagnets are used in relays, as switches that control the relay. Electromagnetic relays were used in traditional telephones as well as the first computers.
Electromagnets are used to sort metals.
Electromagnets are used to power some trains.