What can an electromagnet be used for?
If your computer is using a CRT (instead of an LCD or plasma
screen), the electromagnet is causing the electron beam to "bend"
as it passes across the screen to make the image. If your computer
uses a hard-drive, electro-magnets are used to position the
read/write head, to spin the disk and to write to the head. An
electro magnet is also used to spin the motor of the cooling
fan(s). Electro-magnets are part of your automobile's electrical
system as well. The starter motor uses electro-magnets as do all
electric motors, the ignition coil is little more than specialized
electro-magnets, the automatic door actuators are electro-magnets
as are the injectors and any relays. Electro-magnets are
everywhere, you just need to know where to look.