Yaushe da Inda Aka Gano Magnet

Maganar maganadisu ba mutum ne ya ƙirƙira ba, amma abu ne na maganadisu na halitta.Girkawa na dā da Sinawa sun sami dutsen magnetized na halitta a cikin yanayi

Ana kiransa "magnet".Irin wannan dutse yana iya tsotse ƙananan ƙarfe a cikin sihiri kuma koyaushe yana nuna hanya ɗaya bayan ya yi kisa.Masu jiragen ruwa na farko sun yi amfani da maganadisu azaman kamfas ɗinsu na farko don faɗar alkibla a teku.Wanda ya fara ganowa da yin amfani da maganadisu ya kamata ya zama Sinawa, wato yin “compass” da maganadisu na daya daga cikin manyan kere-kere guda hudu na kasar Sin.

A zamanin da ake fama da rikici, kakannin Sinawa sun tara ilimi da yawa a wannan fanni na maganadisu.Lokacin binciken tamanin ƙarfe, sukan ci karo da magnetite, wato magnetite (wanda ya ƙunshi ferric oxide).An rubuta waɗannan binciken tuntuni.An fara rubuta waɗannan binciken a cikin Guanzi: "inda akwai magneto a kan dutsen, akwai zinariya da tagulla a ƙarƙashinsa."

Bayan dubban shekaru na ci gaba, magnet ya zama abu mai ƙarfi a rayuwarmu.Ta hanyar haɗa nau'ikan gami daban-daban, ana iya samun sakamako iri ɗaya kamar na maganadisu, kuma ana iya haɓaka ƙarfin maganadisu.Mutum yayi maganadisu ya bayyana a cikin karni na 18, amma tsarin samar da kayan maganadisu mai ƙarfi ya kasance a hankali har zuwa samar daAlnicoa cikin 1920s.Daga baya,Ferrite Magnetic abuAn ƙirƙira kuma an samar da shi a cikin 1950s kuma an samar da magnetan ƙasa mai wuya (ciki har da Neodymium da Samarium Cobalt) a cikin 1970s.Ya zuwa yanzu, an haɓaka fasahar maganadisu cikin sauri, kuma ƙaƙƙarfan kayan maganadisu su ma suna sa abubuwan da aka gyara su zama mafi ƙanƙanta.