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Electromagnetism is energy that is created due to a certain physical effect, and this physical effect is made up of the relationship between electrical energy and energy ... electromagnetic environment, electric waves, electromagnetic energy, giant electromagnet, electromagnetic engineering, engineering electromagnetic, emf fields, em wave, anti electromagnetic, electronic magnetic waves, emf waves,

Electromagnetism

Electromagnetism is energy that arises due to a certain physical effect, and this physical effect is made up of the relationship between electric energy and magnetic energy, and electromagnetism is one of the four basic forces of nature, which are electromagnetic energy, weak nuclear energy, strong nuclear, and the force of gravity. But when and how was the electromagnetic force discovered? What are its benefits and uses in our world and our lives?

The history of electromagnetism

It was previously believed that the magnetic force and electric force are two separate forces, each one working separately, but this belief began to change in 1820 when Hans Christian Orsted accidentally noticed that a magnetic field is generated in the wire of an electric circuit that he opens or closes; Where he noticed the deviation of the compass needle to the north when he was conducting some experiments, then he made sure of the existence of a relationship between electric and magnetic energy, but he could not formulate a mathematical equation for this phenomenon, so James Maxwell came after him in 1873, who developed a scientific treatise on electricity and magnetism.

Several scientists followed the discoveries in the electromagnetic field, such as "Andy Ampere", who developed a mathematical equation describing the strength of the electric current and the magnetic force that is between two wires through which an electric current passes.

As well as what the scientist "Michel Faraday" did and how he was able to discover electrical capacitors, and the relationship of electromagnetic waves to light, as he was the first to develop electric motor technology, then came "Heinrich Rudolf Hertz", who is famous for discovering radio waves; As all these discoveries were made in the nineteenth century.

With the beginning of the twentieth century, other discoveries began in the field of electromagnetism, such as the "quantum" theory that expanded the understanding of light, how it was propagated and transmitted in the form of electromagnetic waves and frequencies, and which helped to lay down the laws for radio waves with low frequencies, medium visible light frequencies, and X-rays. High-frequency, and then very high-frequency "gamma" rays.

Names of electromagnetic units

As we said earlier that electricity and magnetism are two inseparable things, and they are one unit, then the units of electrical measurement will be the same as the units of magnetic measurement, which are as follows:

The ampere unit, to measure the intensity of an electric current.
The unit of coulomb to measure electrical charge.
Henry's unit, to measure inductance.
Farad unit, to measure electrical capacitance.
The ohm unit, to measure the electrical resistance of a conductive object.
Voltage unit, for measuring the electric potential difference.
Watts unit, to measure electrical power.
Tesla unit, for measuring magnetic flux.
Weber unit, also for measuring magnetic flux.

Uses of electromagnetism

There is no electrical device in this whole world except for its first dependence on electromagnetic force, and we will mention the most important areas through which humanity benefits from this force, which are as follows:

Lighting: We mentioned lighting first, because it is indisputably one of the most important uses that benefit the whole world, and even the sunlight that reaches us is nothing but electromagnetic waves, and there is no house or street without lighting lights placed in it.
Communications: We can find this clear in all of the radio, satellite and terrestrial channels, telephones, and the Internet, all of these uses have become among the things that it is difficult to adapt or live without, especially after they invade every home and every person's pocket.
Power generation: the electrical generators that work on various types of fuels or steam, all depend on the principle of electricity produced from a moving magnetic field.
The medical field: We always hear about the x-rays that the radiologist takes if there are any problems in the internal organs in the body, as well as the tomography, and other devices that facilitate the work, whether for the doctor or the patient, all of them depend on electromagnetic waves, either in the form of rays Exe, gamma, or others.
The military field: the radars that protect the borders from the penetration of their enemies, operate on electromagnetic waves and frequencies, as well as remote-guided missiles, which depend on photoelectric radiation, which are originally electromagnetic waves.

We have also seen how much we need this energy, and to what degree life becomes difficult without it, we must be thankful for those scientists who sacrificed their time and ages in order to reach these amazing results, and also research should not stop at this point, because there is still more and more to discover. In this area, time Serena wonders.