How Can A Magnet Be Demagnetized Quickly? - Science ABC

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Overview Of A Magnet

A magnet may be defined as any object that exerts a magnetic field. These magnetic fields are invisible, but are most notable when they’re in the presence of iron or another magnet. Two underlying phenomena occur when a magnet is close to such a material; it either attracts or repels the object (provided it can interact magnetically).

2 red horseshoe magnets over a white background with N for north and S for south written on it - Illustration( Olivier Le Moal)s
Permanent magnets (Photo Credit : Olivier Le Moal/Shutterstock)

One of the most common and well-known types of magnets is a permanent magnet. A permanent magnet is an object that can be magnetized and creates a persistent magnetic field. The most common type of permanent magnet that most of us know of is the refrigerator magnet we use to hold up notes on the door of the refrigerator.

Soft And Hard Magnets

Permanent magnets can further be classified into soft or hard magnets. Soft magnets are those materials that can be magnetized but don’t hold their magnetic nature for an extended period. Hard magnets are the exact opposite of soft magnets, as they keep their magnetic properties for an extended period of time and cannot be easily demagnetized.

Sticking Power of Simple Electromagnet Example showing a nail surrounded by coil and connected to dry battery cell producing electromagnetic field for physics science education - Vector(udaix)s
(Photo Credit : udaix/Shutterstock)

Elctromagnet

Another new type of magnet is the electromagnet. An electromagnet is usually made from a coil of wire that behaves like a magnet when electricity is passed through it. However, it stops acting like a magnet the moment the electricity is cut off. There are various methods that can be used to increase the strength of an electromagnet. One such popular method is to wrap the coil around a soft magnet (with the proper orientation) and then turn on the electricity, as this significantly enhances the magnetic effect of the electric coil.

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