{"id":7089,"date":"2022-01-02T12:29:00","date_gmt":"2022-01-02T11:29:00","guid":{"rendered":"https:\/\/ecocranes.hu\/az-elektromagnesesseg-alapjai\/"},"modified":"2025-10-13T16:42:38","modified_gmt":"2025-10-13T14:42:38","slug":"az-elektromagnesesseg-alapjai","status":"publish","type":"post","link":"https:\/\/ecocranes.hu\/en\/az-elektromagnesesseg-alapjai\/","title":{"rendered":"The basics of electromagnetism"},"content":{"rendered":"<p><strong>It is ubiquitous and has a wide range of industrial uses, but many people are still a little hazy about it. Today's article is about electromagnetism.<\/strong><\/p>\n<h2>The definition<\/h2>\n<blockquote><p><em>The electromagnetic field is the field of action created by electric and magnetic fields that fills the entirety of space.<\/em><\/p><\/blockquote>\n<p>While an electric field is the result of a charge that generates static electricity and produces an electric current in an electric conductor, an electric field is <strong>the magnetic field results from the movement of the electric charge and is expressed as a magnetic force<\/strong>.<\/p>\n<p>The <strong>electromagnetic force<\/strong> is one of the four basic forces found in nature. The other three are:<\/p>\n<ul>\n<li>the nucleus that holds the atom together <strong>strong nuclear force<\/strong>;<\/li>\n<li>responsible for certain types of radioactive decay (beta decay) <strong>weak nuclear force<\/strong>;<\/li>\n<li>the mass attraction, i.e. <strong>gravitational force<\/strong>.<\/li>\n<\/ul>\n<p><strong>The electromagnetic<\/strong> refers to the close relationship between electricity and magnetism.<\/p>\n<p><strong>Changes in the magnetic field create an electric field called electromagnetic induction<\/strong>, which enables the existence of widespread everyday devices such as dynamos and generators, electric motors and transformers.<\/p>\n<h2>Discover<\/h2>\n<p>The effect of a lightning strike on a compass <em>first observed by the sailors<\/em>. Written for the first time <strong>William Gilbert<\/strong> - Court Physician to Queen Elizabeth I of England - in the 1600 <em>De Magnete, Magnetisque Corporibus et De Magno Magnete Tellure<\/em> mentioned that both electricity and magnetism can attract or repel objects, but they are different phenomena. The most important difference is that magnets have a rotating effect and electric force has an attractive effect.<\/p>\n<p>The link between lightning and electricity <strong>Benjamin Franklin<\/strong> In 1752, the relationship between electricity and magnetism <strong>Gian Domenico Romagnosi<\/strong> in 1802.<\/p>\n<p>Electromagnetism <strong>Hans Christian \u00d8rsted<\/strong> It was his experiment in 1820 that made him a household name.<\/p>\n<h2>The electromagnet<\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"678\" src=\"https:\/\/ecocranes.hu\/wp-content\/uploads\/2022\/01\/73_transformer-gee55c15e7_1920-1024x678.jpg\" alt=\"Transzform\u00e1tor - elektrom\u00e1gnesess\u00e9g\" srcset=\"https:\/\/ecocranes.hu\/wp-content\/uploads\/2022\/01\/73_transformer-gee55c15e7_1920-1024x678.jpg 1024w, https:\/\/ecocranes.hu\/wp-content\/uploads\/2022\/01\/73_transformer-gee55c15e7_1920-300x199.jpg 300w, https:\/\/ecocranes.hu\/wp-content\/uploads\/2022\/01\/73_transformer-gee55c15e7_1920-768x509.jpg 768w, https:\/\/ecocranes.hu\/wp-content\/uploads\/2022\/01\/73_transformer-gee55c15e7_1920-1536x1018.jpg 1536w, https:\/\/ecocranes.hu\/wp-content\/uploads\/2022\/01\/73_transformer-gee55c15e7_1920-560x371.jpg 560w, https:\/\/ecocranes.hu\/wp-content\/uploads\/2022\/01\/73_transformer-gee55c15e7_1920-400x265.jpg 400w, https:\/\/ecocranes.hu\/wp-content\/uploads\/2022\/01\/73_transformer-gee55c15e7_1920-900x596.jpg 900w, https:\/\/ecocranes.hu\/wp-content\/uploads\/2022\/01\/73_transformer-gee55c15e7_1920-453x300.jpg 453w, https:\/\/ecocranes.hu\/wp-content\/uploads\/2022\/01\/73_transformer-gee55c15e7_1920-1019x675.jpg 1019w, https:\/\/ecocranes.hu\/wp-content\/uploads\/2022\/01\/73_transformer-gee55c15e7_1920-1630x1080.jpg 1630w, https:\/\/ecocranes.hu\/wp-content\/uploads\/2022\/01\/73_transformer-gee55c15e7_1920.jpg 1920w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\"><\/p>\n<p>An electromagnet is usually a <a href=\"https:\/\/ecocranes.hu\/en\/a-darugyartas-alapanyaga-az-acel-i-resz\/\"><strong>soft iron<\/strong><\/a><strong> a core surrounded by at least one roll<\/strong>. A <a href=\"https:\/\/ecocranes.hu\/en\/a-darugyartas-alapanyaga-az-acel-iv-resz\/\">in rolls<\/a> electric current creates a magnetic field, which is oriented according to the right-hand rule. Since the lines of force inside the coil are in the same direction, a magnetic flux is created in the iron, which allows it to attract magnetizable materials. It loses its magnetic properties when the electric current ceases.<\/p>\n<p>Strength of the electromagnet<\/p>\n<ul>\n<li>the amount of current flowing in the coil;<\/li>\n<li>the number of threads on the reel;<\/li>\n<li>the material and relative permeability of the iron core;<\/li>\n<li>the shape and size of the iron core<\/li>\n<\/ul>\n<p>dependent.<\/p>\n<p>The electromagnet <strong>very wide range of applications<\/strong>:<\/p>\n<p>A <strong>electric motors<\/strong> generate kinetic energy using direct or alternating current.<\/p>\n<p><a href=\"https:\/\/ecocranes.hu\/en\/tehermegfogok-a-tehermegfogok-leggyakoribb-fajtai\/\"><strong>As a freight receiver<\/strong><\/a> <a href=\"https:\/\/ecocranes.hu\/en\/a-darugyartas-alapanyaga-az-acel-iii-resz\/\">magnetizable<\/a> <a href=\"https:\/\/ecocranes.hu\/en\/a-darugyartas-alapanyaga-az-acel-ii-resz\/\">Materials<\/a> <a href=\"https:\/\/ecocranes.hu\/en\/daruzasi-megoldasaink\/\">raising<\/a> used in. They control whether the magnet lifts or releases the material by switching the electric current on and off.<\/p>\n<p><a href=\"https:\/\/ecocranes.hu\/en\/konnyuszerkezetes-darurendszerek-tervezese-es-gyartasa\/\">Cableway<\/a> for vehicles with <strong>rail brakes<\/strong> ensures effective braking.<\/p>\n<p>In computers <strong>for data storage<\/strong> (winchester), in medical diagnostics <strong>for imaging<\/strong> (MRI) are used.<\/p>\n<p>The image is from <a href=\"https:\/\/pixabay.com\/hu\/photos\/transzform%c3%a1tor-spir%c3%a1l-teljes%c3%adtm%c3%a9ny-5146204\/\">From Pixabay<\/a> downloaded.<\/p>","protected":false},"excerpt":{"rendered":"<p>It is ubiquitous and has a wide range of industrial uses, but many people are still a little hazy about it. This article is about electromagnetism.<\/p>","protected":false},"author":1,"featured_media":7090,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[144,102],"tags":[165,166,167],"class_list":["post-7089","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-hasznos-tudas","category-hirek-cikkek","tag-elektromossag","tag-magnesesseg","tag-transzformator","has-thumb"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.2 (Yoast SEO v26.6) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Az elektrom\u00e1gnesess\u00e9g alapjai - Eco-Cranes<\/title>\n<meta name=\"description\" content=\"Mindenhol jelen van, ipari felhaszn\u00e1l\u00e1sa igen sz\u00e9les k\u00f6r\u0171, sokaknak m\u00e9gis kicsit k\u00f6d\u00f6sek az ismeretei r\u00f3la. 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