Can you magnetize anything

Magnetize / demagnetize (magnet)

We deal with magnetizing and demagnetizing in this article. I will explain to you what is meant by a magnet and how to magnetize or demagnetize it. This article belongs to the field of physics or electrical engineering. You will also find practice exercises at the end of the article.

In order to understand magnetization and demagnetization, you should first know this: Everyone has probably held a magnet in their hand at some point. With this you can do a piece iron attract. The magnet thus exerts a force on the iron so that it moves. Magnets are bodies that magnetically influence other bodies in their environment. Or to put it differently: magnets exert forces on ferromagnetic substances (e.g. iron, cobalt or nickel).

A magnet consists of many small magnets, which are known as Elementary magnets designated. In order for a substance to become magnetic, these elementary magnets must be aligned. Conversely: If the elementary magnets lose their common alignment, demagnetization takes place. And this is how both works:

Magnetize:

  • In the unmagnetized state, the elementary magnets are completely disordered. This must be changed for magnetization.
  • These elementary particles can align themselves through another magnet. To do this, stroke the object to be magnetized several times with a magnet in the same direction.

Demagnetize:

  • The magnetization is lost when the magnet is heated strongly. Energy is supplied by the heat and the elementary magnets lose their mutual alignment.
  • The magnetization is also lost through vibration, since the vibration also disrupts the elementary magnets.

In the next section we look at the consequences of magnetizing and demagnetizing a little further.

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Magnetize and demagnetize sequence

By magnetizing you get a magnet with so-called Poland, a north pole and a south pole. These names come from the compass needles, which point with their ends to the magnetic poles of the earth. The same poles repel each other, different ones attract each other. Bar magnets and horseshoe magnets also have a north pole and a south pole.

Example bar magnet:

If you take a bar magnet and demagnetize it, it loses its magnetic forces to the outside. The rod is then no longer magnetic and there is no longer a north pole or a south pole towards the outside. Of course, the small elementary magnets still exist inside. However, since they are disordered, the rod no longer has any magnetic effect on the outside.

I recommend you with the same following Exercises to test your knowledge and understanding again. Otherwise you will find even more content in the electrical engineering overview and in the physics overview.

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Tasks / exercises magnetisability

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