The magnetic field is a world to be explored and the electromagnetism it is the strength that is part of it.
Physicist Michael Faraday in his studies discovered the effects that electricity had by magnetism.
Through these effects he was able to explain the nature and properties of magnetic fields. This effect is called magnetic induction.
Michael Faraday discovered that the magnetic field is created by electrical charges that are produced from friction that happens between bodies that can have attraction or repulsion.
This means that energy can be generated by moving a magnet very close to a conductor or inductor. This action creates a movement of electrons, which results in electromagnetic energy or electrical voltage.
Any body contains polarities such as proton (positive charge), electron (negative card) and neutron (neutral charge). The generation of this electrical voltage is due to these polarities.
The place where this force is concentrated is called an electric field. The calculation of the strength of electrical charges is done using Coulomb's Law. This research opened the way for other studies about electricity.
But who put the icing on this cake was the physicist James Clark Maxwell who studied magnetism and electricity.
He researched the effects of Faraday's study but in reverse. He was able to show the variation of the electric field in the magnetic field. He presented 4 equations called Maxwell's equations.
These equations are in the studies of classical electromagnetism. He managed to prove the existence of the electromagnetic field.
He noticed that the concentration of electrical charges and magnetic ones move like electromagnetic waves that are propagated at the speed of light.
Light is a classic example of an electromagnetic wave. Electronic devices such as microwaves, radios and machines for radiographic examinations are also examples of electromagnetism by waves.
Electromagnetism goes beyond what is studied here, and its applications are everywhere in our daily lives, in our devices of communication, on our TVs, stereos, medical equipment, transmitters, etc... And it doesn't stop there, we'll see more about the front that electricity and magnetism are also linked to electromagnetic waves, their characteristics, generation, applications, among others.
See too: Thomson Atomic Model
Electromagnetism is the scientific discipline that studies the electrical and magnetic properties of matter and, in particular, the relationships established between them.
Forces of electrical and magnetic origin had been observed in independent contexts, but in the first half of the 19th century a group of researchers managed to unify the two fields of study, thus constituting a new conception of the physical structure of the bodies.
In 1820 Öersted obtained experimental proof of the relationship, electricity and magnetism, when he brought a compass close to a wire that joined the two poles. from an electric battery, he found that the magnetic compass needle no longer pointed to the north, orienting and in a direction perpendicular to the wire.
Ampère, shortly after Öersted, demonstrated that two electrical currents exerted mutual influence when they circulated through wires close to each other.
We recommend: Thermoelectric power plant.
Electromagnetic phenomena are produced by electrical charges in motion. Electric charge, like mass, is an intrinsic quality of matter and has the particularity of existing in two varieties, conventionally called positive and negative.
The elementary unit of charge is the electron, an atomic particle with a negative sign. As usual unit of charge the coulomb is then used; the charge value of an electron is 1.60 x 10-19 coulombs.
Also be sure to see: Electricity.
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