How many types of electromagnetism are there?

Electromagnetism studies the interactions found in electric charges that are expressed by electric fields and magnetic fields, connected. Both electric and magnetic fields have electric charges.

The interactions of electromagnetism were discovered in 1821, thanks to the British scientist Michael Faraday who with the help of James Clerk Maxwell completed the phenomenon in 1865.

Types of electromagnetism that exist

When we talk about electromagnetic fields, we can divide them into two types of electromagnetism: static electric fields and static magnetic fields; with their respective charges. In addition to these two types of electromagnetism, we find the electromagnetic fields variable in radiation and in time, where charges and fields are in constant movement.

Electrical charges are central to magnetic and electromagnetic forces. The difference between magnetic and electromagnetic forces is the charge dynamics of each. The electric force and the magnetic force are produced with moving charges, the difference is that the static force in addition to this way of obtaining these charges, can also obtain them with static charges. On the other hand, the electric force can condition charged particles in motion or stationary, while the magnetic force only creates influence on moving charges.

Electrical phenomena do not only remain in natural phenomena and anthropic phenomena but are also found in atoms. These subatomic particles give stability to the various properties of a material.

It should be noted that the magnetic force is also present in all atoms (diamagnetism), with the electric force being lower. As soon as the presence of unpaired electrons appears, we find paramagnetism, which is a higher force. Paramagnetism depends on interactions between some atoms and molecules, in other words, it does not occur in individual atoms. The molecules that generate these interactions are the basic components of magnets.

Uses and applications of electromagnetism

Electromagnetism can be found in several sectors such as engineering, electronics, aeronautics, medicine... We can also find applications of electromagnetism in daily life in:

  • Bells: The bell through an electromagnet receives an electric charge that produces a magnetic field attracting a kind of hammer with a metal. Subsequently, the noise is produced due to. The operation of these bells is based on electromagnetic phenomena.

  • Microwave: This appliance produces electromagnetic radiation that vibrates the water molecules found in the food, which generates heat for cooking the food.

  • Microphone: This instrument through a membrane is attracted by a magnet inside a magnetic field producing sound in an amplified form. The microphone is one of the most common electromagnetic applications.

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