What is electromagnetism and how does it affect magnets?

Electromagnetism is the science that combines both magnetism and electricity to explain magnetic fields in magnets and their electromagnetic force.

What is electromagnetism?

Electromagnetism is the branch of physics that deals with electricity, magnetism and the interaction between them. It was first discovered in the 19th century and finds a wide range of application in today's world of physics.

Electromagnets are basically the science of electromagnetic fields. An electromagnetic field is the field generated by electrically charged objects. Radio waves, infrared waves, ultraviolet waves and X-rays are all electromagnetic fields in a certain frequency range. Electricity is generated by the change of the magnetic field. The phenomenon is also called "electromagnetic induction". Similarly, the magnetic field is generated by the movement of electric charges.

The Basic Law is known as the "Faraday Induction Law". The phenomenon of electromagnets was discovered in the 19th century and led to the discovery of the "special theory of relativity" by Albert Einstein. According to his theory, electric and magnetic fields could transform each other by relative motion. This phenomenon and its applications were discovered due to the numerous contributions of great scientists and physicists such as Michael Faraday, James Clerk Maxwell, Oliver Heaviside and Heinrich Hertz. In 1802, an Italian scholar demonstrated the relationship between electricity and magnetism by diverting a magnetic needle with electrostatic charges.

It is basically based on the assumption of a combined expression of an underlying force. This force is visible when an electric charge is moved. This movement generates magnetism. This idea was presented by James Clerk Maxwell, who published the theory of electricity and magnetism in 1865. Based on this theory, other scientists have discovered many applications and other effects. Magnetism has also extended to the field of quantum physics, where light propagates like a wave and interacts like a particle.

It has been shown that electricity can cause magnetism and vice versa. A very simple example is that of an "electrical transformer". The exchange takes place inside the transformer, which causes electromagnetic waves. Another fact with these waves is that they do not need a means to spread, though they have a relatively slow speed when passing through transparent substances.

electromagnetismo y como afecta a los imanes


Properties of electromagnetism

The electromagnetic force is one of the four known basic forces.

With the exception of gravity, it is responsible for virtually all phenomena encountered in daily life above the central scale. In general terms, all the forces involved in the interactions between atoms can be explained by the electromagnetic force acting between the electrically charged atomic nuclei and the electrons of the atoms. Electromagnetic forces also explain how these particles carry impulses through their motion. This includes the forces we experience when we "push" material objects resulting from intermolecular forces acting between the individual molecules in our bodies and those of objects. Electromagnetic force is also involved in all forms of chemical phenomena.

A necessary part for understanding intra-atomic and intermolecular forces is the effective force generated by the impulse of electron motion, so much so that when electrons move between interacting atoms, they carry an impulse. As a collection of electrons narrows, their minimum impulse necessarily increases due to Pauli's principle of exclusion. The behaviour of matter at the molecular level, including its density, is determined by the equilibrium between the electromagnetic force and the force generated by the momentum exchange carried by the electrons themselves.

Magnets with electromagnetic force

The following materials have magnetic properties:

  •  Iron

  • Nickel

  • Dysprosium

  • Erbio

  • Terbium

  • Cobalt

  • Gadolinium

  • Holmium

For more information or questions, contact the specialists at ImagnetShop.

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