What is the relationship between the magnetic poles and direction of a magnet? How long is the life of a magnet?

Magnets can generate magnetic fields and have the property of attracting ferromagnetic materials such as iron, nickel, cobalt and other metals. What is the relationship between the magnetic poles and directions of a magnet? How long is the life of a magnet? Is the magnetic strength of a magnet permanent? Let's learn about the common knowledge about magnetic fields.

Contents of this article

1. What is the relationship between the magnetic poles and direction of a magnet?

2. What is the general lifespan of a magnet?

3. Is the magnetic strength of a magnet constant?

What is the relationship between the magnetic poles and direction of a magnet?

The magnetic poles and directions of a magnet correspond to each other. The components of a magnet are iron, cobalt, nickel and other atoms. The internal structure of the atoms is quite special and has its own magnetic moment. Magnets can generate magnetic fields and have the characteristics of attracting ferromagnetic materials such as iron, nickel, cobalt and other metals.

The property of a mineral being attracted or repelled by an external magnetic field is called the magnetism of the mineral. Under normal circumstances, the force of magnetic field repelling a mineral is very weak. Therefore, when identifying, sorting, and generally studying minerals, the magnetism we refer to mainly refers to the property of a mineral being attracted by an external magnetic field.

What is the lifespan of a magnet?

The life of a magnet is generally 5-10 years. There are two main factors that affect the life of a magnet, namely corrosion and demagnetization. For easily corroded magnets, such as neodymium iron boron, the powder may melt away within a year if the plating or the material itself is not good. Demagnetized magnets, especially those demagnetized at high temperatures, undergo phase changes inside, and even if they are re-magnetized, they cannot recover their original performance.

magnet:

The components of magnets are iron, cobalt, nickel and other atoms. The internal structure of the atoms is quite special and they have magnetic moments. Magnets can generate magnetic fields and have the characteristics of attracting ferromagnetic materials such as iron, nickel, cobalt and other metals. Magnets can be divided into "permanent magnets" and "non-permanent magnets". Permanent magnets can be natural products, also known as natural magnets, or they can be artificially made. Non-permanent magnets, such as electromagnets, will only be magnetic under certain conditions. Magnets are also called magnetic steel, which is divided into two categories: soft magnets and hard magnets. The reason why magnets have magnetic force is that the earth's magnetic field and electric current will continue to combine strongly due to its rotation, and finally the entire earth becomes a large magnetic field. Minerals on the earth such as nickel, cobalt, iron and other materials rotate due to the rotation of the earth, thus becoming natural magnets.

Is the magnetic strength of a magnet constant?

The magnetic field strength of the permanent magnet is also slowly decreasing, but it is very slow.

Notes on slowing down magnetic decline:

1. Do not use it in a strong magnetic field, otherwise it will be demagnetized or the magnetic direction will change.

2. It cannot work at high temperature, as the high temperature excitation of polymer motion will cause the magnetic particles to become disordered and demagnetized.

3. Try to avoid contact between the same poles of two permanent magnets, as this will reduce the magnetic field.