Electromagnetic inductionElectromagnetic induction was discovered by Michael Faraday in 1831 by demonstrating the ability to generate an induced electric current from a magnetic field. This discovery led to the construction of generators.What is electromagnetic induction?Electromagnetic induction is the generation of electricity by the creation of electric currents through fields that change over ...
Joule's LawJoule's law was a phenomenon discovered by the British James Prescott Joule, in 1840 he published his study known as "heat production by voltaic electricity" which consequently established the fact.What does Joule's law consist of?The current produces heat through the resistance of the conductor material. This resistance is created by the ...
What are atoms?Atoms were discovered by John Dalton, an English chemist, who under his theory proved that matter was made up of invisible particles.Atoms are the smallest particles that can be found within an element, with the ability to maintain several physical and chemical characteristics. An atom cannot be broken down chemically.What ...
OHM's LawOhm's law was formulated by George Simon Ohm who studied electricity and after carrying out several investigations, in 1827 he discovered this law. This law relates the magnitudes of:VoltageResistanceCurrentOhm's law states that: the ntensity of electric charge is expressed in amperes (A), which circulates inside an electrical circuit is directly ...
The electromagnetic spectrumThe magnetic spectrum was discovered by Wilhelm Conrad Röntgen in 1895 and was responsible for producing electromagnetic radiation in the wavelengths that refer to X-rays. Before the electromagnetic spectrum, we can find the normal spectrum which was discovered by Isaac Newton in 1666, placing several lenses next to a prism and through it, he could see the ...
Terrestrial magnetismTerrestrial magnetism is the presence of a magnetic field on Earth, creating a resemblance to a large magnet. The earth's magnetic field is produced by the formation of the spiral where we find Ampère's law that later originates an electric field, Faraday's law. In 1600 a doctor, William Gilbert, while carrying out a study on magnetism, discovered that ...
Ampère's lawAmpère's law is a law that is part of Maxwell's 4 equations, it replaced Biot Savart's law. This law allows us to calculate the magnetic field by means of electric currents. The law was discovered in 1826 by André Marie Ampère and connects the electric current intensity and the magnetic field it produces.Unlike ...
The magnetic force of magnetsThe magnetic force found in a magnet refers to the residual effect of the magnetic force between moving charges.The unit in the international system that refers to the magnetic force in a magnetic field is the tesla (T). In contrast, the strength of a magnetic field in a magnet is measured in ...
What is paramagnetism?Paramagnetism was discovered by Michael Faraday, who determined that most elements exhibit some level of paramagnetism. Paramagnetism is a type of magnetism that is weakly attracted by a magnetic field that is activated from the outside. This type of magnetism is found in paramagnetic materials.Paramagnetic materials are materials that have permanent atomic dipoles which ...
What is diamagnetism?Diamagnetism is a characteristic that a magnet possesses when the magnetization in the opposite direction to the application of the magnetic field is weak. Consequently, we can observe that material with this property, in other words, a diamagnetic material, is repelled by a magnet.In 1778, Sebald Justinus Brugmans was ...
Faraday's Law and Lenz's LawMichael Faraday was a British-born physicist and chemist. In 1831, after conducting several experiments, he discovered electromagnetic induction. It was at this time that it was discovered that an electric field can be created from a varying magnetic field. It was this event that prompted Faraday's law and Lenz's law.Faraday's law or ...
About magnets, Scientific Disclosure
Rare earth magnets and ceramic magnetsRare earth magnets and ceramic magnets are permanent magnets. Permanent magnets are objects that have the ability to maintain the property of magnetization for an extended period of time. Depending on the properties of the magnet, we find neodymium, ferrite, alnico, and samarium magnets.The rare earth group is composed of ...
Differences between ferromagnetic, paramagnetic, and diamagnetic materialsMagnetic materials can be classified according to the magnetic properties due to the attraction field stimuli that the different materials have to various types of responses they give. These materials have the ability to attract or repel ...
What is an electro-permanent magnet?The first electro-permanent magnet was created in 1824 by the physicist William Sturgeon. This physicist connected a wire to the two ends of a battery, this wire was wound to an iron bar as we can see in the photo.
How can you know the magnetic field strength of a magnet?A magnetic field is a forced space created by the magnet around it due to its electric charges.Magnetic fields can be grouped into classes depending on the source of creation:Magnet magnetic fields: this type ...
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