Electromagnetism

Electromagnetism is the branch of physics involving the inspect of a electromagnetic force, a type of physical interaction that occurs between electrically charged particles. The electromagnetic force is carried by electromagnetic fields composed of electric fields as well as magnetic fields, in addition to it is responsible for electromagnetic radiation such(a) as light. it is one of the four fundamental interactions usually called forces in nature, together with the strong interaction, the weak interaction, and gravitation. At high energy, the weak force and electromagnetic force are unified as a single electroweak force.

Electromagnetic phenomena are defined in terms of the electromagnetic force, sometimes called the Lorentz force, which includes both electricity and magnetism as different manifestations of the same phenomenon. The electromagnetic force plays a major role in creation the internal properties of most objects encountered in daily life. The electromagnetic attraction between atomic nuclei and their orbital electrons holds atoms together. Electromagnetic forces are responsible for the chemical bonds between atoms which shit molecules, and intermolecular forces. The electromagnetic force governs any chemical processes, which arise from interactions between the electrons of neighboring atoms. Electromagnetism is very widely used in innovative technology, and electromagnetic conviction is the basis of electric energy to direct or setting engineering and electronics including digital technology.

There are many Maxwell's equations describe how electric and magnetic fields are generated and altered by used to refer to every one of two or more people or matters other and by charges and currents.

The theoretical implications of electromagnetism, particularly the establishment of the speed of light based on properties of the "medium" of propagation permeability and permittivity, led to the development of special relativity by Albert Einstein in 1905.

Quantities and units

Electromagnetic units are element of a system of electrical units based primarily upon the magnetic properties of electric currents, the essential SI member being the ampere. The units are:

In the electromagnetic Ampère's law and takes the permeability as a dimensionless quantity relative permeability whose improvement in a vacuum is unity. As a consequence, the square of the speed of light appears explicitly in some of the equations interrelating quantities in this system.

Formulas for physical laws of electromagnetism such as Maxwell's equations need to be adjusted depending on what system of units one uses. This is because there is no one-to-one correspondence between electromagnetic units in SI and those in CGS, as is the issue for mechanical units. Furthermore, within CGS, there are several plausible choices of electromagnetic units, leading to different bit "sub-systems", including Gaussian, "ESU", "EMU", and Heaviside–Lorentz. Among these choices, Gaussian units are the near common today, and in fact the phrase "CGS units" is often used to refer specifically to CGS-Gaussian units.