One example of a magnet is a refrigerator magnet. These are also called permanent magnets because they always retain a certain degree of their magnetism. There some other general categories for magnets, such as temporary magnets and electromagnets.Continue Reading
Temporary magnets are objects that will act like permanent magnets when they are in a strong magnetic field. Many household objects are temporary magnets, such as paperclips, staples and other related objects.
Electromagnets are magnets that use electrical power to create very powerful magnetic fields. Electromagnetism actually is the technology that allows computers and televisions to work, according to How Magnets Work, a reference site on magnet science topics. Electromagnets work by having a metal core, usually iron, surrounded by a coil of wire. The wire carries a current, which creates the magnetic field. When the current is turned off, however, the apparatus is demagnetized.Learn more about Magnetism
Permanent magnet generators produce electricity by rotating strong magnets around metal wires. These conductive wires then convey the electricity throughout a residence or industrial complex for decades, because the magnets do not have to be replaced for up to 25 years.Full Answer >
In addition to the simple magnets on the refrigerator that hold up photos, coupons or shopping lists, magnets (often electromagnets) are also found in virtually any electric device or appliance with a motor, transformer, relay or solenoid.Full Answer >
Based on magnetic properties, there are three major types of magnets: permanent, temporary and electromagnets. Permanent magnets retain their magnetism once magnetized while temporary magnets only exhibit magnetic properties whenever they come within range of a magnetic field, and only for a short period. Electromagnets are magnets that only display magnetic properties when current passes through their core.Full Answer >
Electromagnets are temporary magnets which have a magnetic field only when current passes through them. Some everyday applications of electromagnets include generators, motors, microphones, loudspeakers and cranes. Electromagnets are also used in scientific equipment such as particle accelerators, mass spectrometers and NMR (Nuclear Magnetic Resonance) spectrometers.Full Answer >