Magnetism-Property of Iron

 Magnetism-Property of Iron Dissertation



From Wikipedia, the free encyclopedia

This article is about magnet materials. For information about things and equipment that create a magnetic field, seeВ magnet. Intended for fields that magnets and currents generate, seeВ magnetic field. For different uses of " Magnetism", seeВ Magnetism (disambiguation). Magnetic leads here. To get other uses of permanent magnetic, seeВ Magnetic (disambiguation)

A magnetic quadrupole


* ElectricityВ * Magnetism




Electric powered network[show]

Covariant formulation[show]



MagnetismВ is a category of physical phenomena that includes forces applied byВ magnetsВ on other magnets. It has its origin in electrical currents and the fundamentalВ magnetic momentsВ of elementary allergens. These promote aВ magnetic fieldВ that acts upon other power and occasions. All materials are influenced to some extent with a magnetic field. The most powerful effect is usually on long lasting magnets, that have persistent permanent magnetic moments caused byВ ferromagnetism. The majority of materials don’t have permanent moments. Some are attracted to a magnetic field (paramagnetism); others will be repulsed by a magnetic discipline (diamagnetism); others have a much more complex relationship with an applied permanent magnetic field (spin glassbehavior andВ antiferromagnetism). Substances which might be negligibly impacted by magnetic domains are well-known asВ non-magneticВ substances. They will includecopper, В aluminium, В gases, andВ plastic. PureВ oxygenВ exhibits magnet properties when cooled to aВ liquidВ state. The magnetic condition (or phase) of a material depends on heat (and different variables such as pressure and the applied magnet field) so that a materials may exhibit more than one type of magnetism based on its temperatures, etc . -------------------------------------------------


Main article: В History of electromagnetism

Aristotle attributed the first of might be known as scientific dialogue on magnetism to Thales of Miletus, who lived coming from about 625 BC to about 545 BC.[1] Around the same time, in ancient India, the Indian physician,  Sushruta, was your first to make use of the magnet for medical purposes.[2] In ancient China, the earliest literary mention of the magnetism lies in a next century BC book named after its publisher,  The Master of Satanic force Valley (鬼谷子): " The lodestone makes straightener come or perhaps it draws in it. "[3] The earliest reference to the attraction of the needle appears in a operate composed among AD 20 and 75 (Louen-heng): " A lodestone attracts a needle. "[4] The Chinese scientist Shen Kuo (1031–1095) was the first-person to write in the magnetic filling device compass and this it improved the reliability of navigation by employing the astronomical concept of true north (Dream Pool Essays, AD 1088), and by the 12th 100 years the Chinese language were known to use the lodestone compass for navigation. That they sculpted a directional tea spoon from lodestone in such a way that the handle with the spoon often pointed south. Alexander Neckam, by 1187, was the first in Europe to identify the compass and its use for nav. In 1269,  Peter Peregrinus de Maricourt wrote the Epistola para magnete, the first extant treatise conveying the real estate of magnets. In 1282, the houses of magnets and the dried compass had been discussed by Al-Ashraf, a Yemeni physicist,  astronomer, and geographer.[5]

Jordan Faraday, 1842

magnets get rid of from same poles In 1600, В William GilbertВ published hisВ De Magnete, Magneticisque Corporibus, ou de Magno Magnete TellureВ (On the Magnet and Permanent magnet Bodies, and the Great Magnetic the Earth). In this work he explains many of his experiments with his model the planet called theВ terrella. From his experiments, he concluded that theВ EarthВ was itself permanent magnet and that this is the reason compasses pointed north (previously, a few believed it turned out the pole star (Polaris) or a significant magnetic tropical isle on...