Magnetic Encyclopedia

Magnet: Unveil the mystery of the magnetic world

What is magnet?

Magnetic is an object that can produce magnetic substances such as magnetic fields and attracts iron. In simple terms, magnets are like an invisible magnetic field launcher, which can firmly adsorb the surrounding magnetic substances.

Types and characteristics of magnets

• Permanent magnet: Once magnetized, it can maintain magneticity for a long time, commonly in refrigerator stickers, compass, etc.
  Natural magnet: magnets ore exist in nature.
• Artificial magnets: Magnetic magnets, such as 钕 magnets, iron oxygen magnets, etc., are more magnetic.
• Non -permanent magnets: need to be powered on to generate magnetism, such as electromagnets.

Principles of magnets

The magneticity of the magnet comes from the movement of the internal electrons of the atom. When the direction of these electronic movements is consistent, a magnetic field is generated. The north and south poles of magnets are the most concentrated part of the magnetic force.

Magnetic application

The application of magnets is widely used. From the refrigerators, stickers, compass commonly common in daily life, to motor, generators, and MRI in medical equipment in industrial production, the magnetic resonance imagingers in medical equipment are inseparable from magnets.

• Electronic products: hard disk, speaker, microphone, etc.
• Industry: motor, generator, magnetic suspension train, etc.
• Medical: MRI's resonance imaginger.
• Daily life: refrigerator magnetic stickers, compass, etc.

The future of magnets

With the advancement of science and technology, the application field of magnets will continue to expand. For example, using the characteristics of magnets, scientists are researching and developing smaller and stronger magnetic materials to apply cutting -edge technology such as quantum computing.

Common problem

• Why does magnet attract iron? This is because the internal electron movement direction of the atoms of the magnetic substances such as iron can be affected by the magnetic field of the magnet, which produces the same magnetic pole as the magnet, so it is attracted.
• Can the North and South Pole of Magnet be separated? Can't. No matter how small the magnet is cut into a small piece, each small piece will have the North and South poles at the same time.
• Is magnets harmful to the human body? Generally speaking, the static magnetic field has little impact on the human body. However, a strong magnetic field or a variable magnetic field may interfere with electronic devices such as cardiac pacemakers, so you need to pay attention.

in conclusion

As a magical material, magnets not only play an important role in our daily life, but also have broad application prospects in scientific research and technology development.