Magnets are elements that have a magnetic field, which can attract or repel another magnet. These magnetic iron minerals have the property of attracting steel, iron, nickel and other metallic bodies. They have two main poles: the negative and the positive.

Today magnets are present in all the things we use daily, since everything that works with electricity needs the use of magnets. These are used in all kinds of things, because their magnetic field is capable of interacting with the electric current.

Magnets are so versatile that they are used for many things, such as: storing or saving data on hard drives or on bank card strips, on speakers or speakers, on magnetic walls, in basic switches, in closures for refrigerators or freezers and in electric motors. They also have an important use in medicine and industry.

How does a magnet work?

Magnets work through magnetic fields that are responsible for the repulsion or attraction between magnets . They generate electricity due to the movement of their electrons. The magnetic property of a natural magnet is that its atoms are arranged in such a way that they create a magnetic field.

To create an artificial magnet, it is enough to pass an electric current through a coil to generate a magnetic field inside. In this way when the coil is connected to the internal current of the metal, it will be able to attract metallic objects and lose the condition of magnet when it is disconnected.

Properties of magnets

Among the properties of magnets we can mention the following:

  • Its main characteristic is to attract iron or steel materials.
  • The attraction of the magnet is made with more force at each of its ends, and decreases as it reaches its point, which is when it achieves zero force.
  • Some magnets have greater power of attraction and greater distance than others. This lies in the magnetic force of each magnet. The extent or space in which it performs that force is called the magnetic field.
  • Magnetic attraction can be done through glass, water, paper, and other bodies, as long as they are not very thick.
  • Poles of equal charges are rejected and poles of different charges attract. This means that a “positive” pole repels another “positive” pole, and a “negative” pole attracts a “positive” pole.
  • Magnets can transmit their magnetic properties or magnetize iron and steel; but not in the same conditions, since the magnetization of the steel remains and that of the iron is for a moment.

Classification of magnets

Magnets are classified according to the way they have taken their magnetism and its duration. These are divided into three main classifications:

Natural magnets:

These magnets are those that occur or are generated in nature, and physically they are rocks of a hard consistency and of a black color.

Permanent artificial magnets:

Artificial magnets have and develop stronger magnetic fields. These have been created by man and are what we frequently handle. These magnets can be made in many ways and serve multiple purposes.

Temporary artificial magnets:

Artificial magnets are determined temporary when the magnetic field they possess is dependent on some other element. They are also known as electromagnets and will always be temporary, because they cannot function without electricity. The electromagnets are used in their great majority in an industrial level. Example: they are used to lift cars in landfills.

What is an electromagnet?

An electromagnet is an artificial magnet that has a soft or light iron in its center or main axis, which is surrounded by a coil or a wound wire, through which an electric current circulates, which gives it the properties of a perfect magnet.

Using the electromagnet

Electromagnets are used in many settings, as they have very decisive advantages over natural magnets. They can be activated and deactivated when required and have the property of being able to change the magnetic field produced quickly and easily. To do this, you only need to adjust the amount of electrical energy applied.

With the electromagnets they can produce:

  • Electromagnetic brakes (used in some trains).
  • Electromagnetic clutches for vehicles.
  • Electric motors and many more applications.

What types of magnets are there?

Ferrite  These magnets are brittle but have excellent corrosion resistance. They are made from an alloy of iron oxide with barium or strontium ferrite. The most widely used ferrite magnets are bars, horseshoes, and rings, which are widely used in homes, industry, electronics, and engineering.

Alnico.  They are permanent magnets based on an alloy of aluminum, nickel and cobalt. They are characterized by maintaining their magnetic properties and stability at very high temperatures, although their coercive force is very small.

Samaritan . Samaritic magnets have a high resistance to corrosion, oxidation and temperatures above 350 ° C. They are magnets that have a magnetic alloy with cobalt. They are used in space vehicles, airplanes, miniature electric motors, computer equipment and in portable devices such as: watches, headphones, cell phones, etc.). They are also used in strategic developments and military applications because they are ideal for working in difficult conditions and aggressive environments.

Neodymium . These magnets have an alloy of neodymium, iron, and boron and are used to create powerful latches, power generators, and lifting machines. They are brittle magnets and operate at low temperatures.

Magnetoplastics . They are flexible, soft and light magnets. The adhesive components of vinyl, plastic, acrylic, and rubber can make magnets of various shapes and sizes. Due to their lower magnetic strength relative to other types of magnets, they are used to make promotional products, make removable stickers for vehicles and various gift and stationery products.

Magnet Applications

Since the advent of magnets, the possibilities for their applications have developed very rapidly. Either because of their size or shape, they have taken over a large part of the different industries such as:

  • Electrical industry: they are used in Hall sensor technology, relays, electrical tools and appliances, proximity sensors, electric motors, textile machines, among others.
  • Automotive Industry: Used in the use of brake systems, speed tachometers, central locking mechanisms, windshield wiper system, etc.
  • Power Generation Industry: They are excellent when used in turbines, windmills, dynamos, power generators.
  • Aeronautical and aerospace industry: they are used in navigation, in control systems, in bases or physical facilities.
  • Medicine or medical industry: in this sector they are used to carry out some radiological studies such as magnetic resonance tomography.
  • Telecommunications industry: they are used in the manufacture of microphones, televisions, headphones, speakers, telephones, etc.
  • Electronic industry: they are used in the elaboration of products destined to save and store information such as: hard drives, credit or debit cards that have magnetic stripes.

What are magnets for in health?

Currently, magnets are used to treat arthritis and eradicate pain in the back, joints, hands and feet. Many people wear jewelry or clothing made with magnets in order to soothe or eradicate pain.

What function do magnets have in the body?

The main objective of the use of magnets in the body is to improve the health condition of our body, and this is achieved through magnet therapies. The purpose of these therapies is to achieve a variation in the voltage of cells that have undergone a transformation of the energy generated by a disease.

Magnet therapy

Magnetotherapy is a therapy produced by permanent magnets . This therapy generates very beneficial changes in all people, when the magnetic flux is administered in the correct doses and intensities. One of the immediate benefits that this therapy produces is the sensation of vitality and the state of relaxation at the muscular level that patients present.

These treatments with magnets can be carried out in a general or local way. In general treatments, a type of high-density magnet is used. And in local treatments a magnet with low suggestion and low weight is used.

Health benefits of magnet therapy:

  • A balance is achieved in the metabolism in terms of the amount of calcium and iron in the body.
  • You get a cleanse in terms of calcium deposits and fat found in the arteries.
  • A balance for blood pressure is achieved.
  • Stimulates and activates defense mechanisms in the immune system.
  • Generates a direct and favorable action on fibroblasts (natural rejuvenation).
  • Provides a better mood and energizes the body in those moments of general exhaustion.

Conclusion about magnets

A magnet is a unit capable of producing or generating its own magnetic field and it is for this reason that they have the ability to attract other metallic materials such as iron, nickel or cobalt. Depending on the types of magnets, these are used for industry, for commerce and are even used in the health field offering great benefits. Without magnets, it would not have been possible to advance in technology, which we enjoy today.

Samantha Robson
 | Website

Dr. Samantha Robson ( CRN: 0510146-5) is a nutritionist and website content reviewer related to her area of ​​expertise. With a postgraduate degree in Nutrition from The University of Arizona, she is a specialist in Sports Nutrition from Oxford University and is also a member of the International Society of Sports Nutrition.

Similar Posts

Leave a Reply

Your email address will not be published. Required fields are marked *