Mphamvu ya Maginito: Chodabwitsa Chomwe Chili M'mbuyo mwa Zodabwitsa za Fiziki
Magnetism ndi chimodzi mwa zinthu zachilengedwe zodabwitsa kwambiri ndipo chimagwiritsidwa ntchito kwambiri pa moyo watsiku ndi tsiku. Kuyambira ma compass omwe amathandiza ofufuza kupeza njira yawo mpaka ukadaulo wapamwamba monga magnetic resonance imaging (MRI), magnetism yakhala ndi gawo lofunika kwambiri m'mbali zambiri za moyo wa anthu. Nkhaniyi ifotokoza mfundo yoyambira ya magnetism, mbiri ya kupezeka kwake, momwe imagwiritsidwira ntchito pa moyo watsiku ndi tsiku, komanso momwe imagwirira ntchito komanso momwe imakhudzira dziko lamakono.
Lingaliro Loyamba la Mphamvu ya Maginito
Tanthauzo ndi Katundu wa Maginito
Maginito ndi chinthu chomwe chimatha kukopa zinthu za ferromagnetic monga chitsulo, nickel, ndi cobalt. Makhalidwe oyambira a maginito ndi monga mizati ya kumpoto ndi kum'mwera, komwe mizati yotsutsana imakokana, pomwe mizati yofanana imakokana. Iyi ndiye mfundo yayikulu yomwe imagwiritsa ntchito maginito m'njira zosiyanasiyana.
Maginito amatha kugawidwa m'magulu awiri akuluakulu: maginito achilengedwe ndi maginito opangidwa. Maginito achilengedwe, monga lodestone kapena magnetite, amapezeka m'chilengedwe, pomwe maginito opangidwa amapangidwa pokonza zinthu zina kuti apange mphamvu yamaginito.
Munda wa Maginito
Mphamvu ya maginito ndi malo ozungulira maginito komwe mphamvu ya maginito imatha kumveka. Mphamvu iyi imawonetsedwa ndi mizere ya mphamvu ya maginito yomwe imatuluka kumpoto kwa maginito ndikulowanso kumwera. Mphamvu ya mphamvu ya maginito imadalira mtunda kuchokera ku maginito ndi mphamvu ya maginito yokha.
Malamulo Oyambira
Lamulo loyambira lolamulira mphamvu ya maginito ndi lamulo la Coulomb la maginito, lomwe limati mphamvu pakati pa mitengo iwiri ya maginito imagwirizana mwachindunji ndi zomwe zapezeka pa mphamvu ya mitengo iwiriyo ndipo imafanana mosiyanasiyana ndi sikweya ya mtunda pakati pawo. Kuphatikiza apo, lamulo la Ampère ndi lamulo la Faraday ndizofunikiranso pofotokoza zochitika zamagetsi.
Mbiri ya Kupezeka kwa Magnet
Mbiri ya maginito inayamba zaka masauzande ambiri. Kugwiritsa ntchito maginito koyamba kunayambira ku China ndi Greece yakale. Anthu aku China ankagwiritsa ntchito miyala yamtengo wapatali popanga makampasi osavuta kuti athandize kuyenda panyanja. Kupeza kumeneku kunakhudza kwambiri kufufuza ndi malonda kwa zaka mazana ambiri.
M'zaka za m'ma 19, asayansi monga Hans Christian Ørsted, André-Marie Ampère, ndi Michael Faraday adapeza zinthu zofunika kwambiri zomwe zimagwirizanitsa magetsi ndi maginito. Ørsted adapeza kuti magetsi amatha kupanga maginito, pomwe Ampère adakulitsa kumvetsetsa kwathu kwa ubale womwe ulipo pakati pa magetsi ndi maginito. Koma Faraday adapeza njira yopangira maginito, yomwe ndi maziko a zida zambiri zamagetsi zamakono.
Kugwiritsa Ntchito Mphamvu ya Maginito M'moyo Watsiku ndi Tsiku
Kugwiritsa Ntchito Zamagetsi
Chimodzi mwa zinthu zomwe zimagwiritsidwa ntchito kwambiri pa mphamvu ya maginito ndi zamagetsi. Maginito amagwiritsidwa ntchito m'zida zosiyanasiyana, kuphatikizapo zokuzira mawu, maikolofoni, ndi ma mota amagetsi. Mwachitsanzo, mu zokuzira mawu, maginito amagwira ntchito limodzi ndi koyilo kuti asinthe zizindikiro zamagetsi kukhala mafunde a phokoso.
Ukadaulo Wachipatala
Magnetism imagwiranso ntchito yofunika kwambiri muukadaulo wazachipatala, makamaka mu magnetic resonance imaging (MRI). MRI ndi njira yojambulira zithunzi yomwe imagwiritsa ntchito mphamvu yamphamvu ya maginito ndi mafunde a wailesi kuti ipange zithunzi zatsatanetsatane za ziwalo ndi kapangidwe ka thupi mkati mwa thupi. MRI yakhala chida chofunikira kwambiri pozindikira matenda chifukwa cha kuthekera kwake kupereka zithunzi zomveka bwino popanda kugwiritsa ntchito X-ray kapena ma radiation ena a ionizing.
Kuyenda ndi Mayendedwe
Maginito amagwiritsidwanso ntchito m'makina amakono oyendera. Dongosolo Loyang'anira Malo Padziko Lonse (GPS) limagwiritsa ntchito ma satellites kuti lidziwe komwe kuli pogwiritsa ntchito mphamvu ya maginito ya Dziko Lapansi. Kuphatikiza apo, sitima za Maglev (magnetic levitation) zimagwiritsa ntchito mphamvu ya maginito kukweza ndi kuyendetsa sitima popanda kukhudzana ndi njanji, zomwe zimathandiza kuti liwiro lapamwamba komanso kuyenda bwino.
Kusungirako Deta
Mu makompyuta ndi ukadaulo wazidziwitso, mphamvu ya maginito imagwira ntchito yofunika kwambiri pakusunga deta. Ma hard disk drive (HDD) ndi chitsanzo chabwino, pomwe deta imasungidwa mu mawonekedwe a mphamvu ya maginito pa mbale zachitsulo. Kupita patsogolo kwaukadaulo kwathandiza kuti deta isungidwe mwachangu komanso mwachangu pogwiritsa ntchito mfundo za mphamvu ya maginito.
Zosowa za tsiku ndi tsiku
M'nyumba, maginito amagwiritsidwa ntchito pazinthu za tsiku ndi tsiku monga kutseka zitseko za firiji, mabatani a bra ndi matumba, ndi zoseweretsa zophunzitsira ana. Ntchito zimenezi zimasonyeza momwe maginito amagwiritsidwira ntchito m'moyo wa tsiku ndi tsiku.
Momwe Mphamvu ya Maginito Imagwirira Ntchito
Kugwirizana kwa Maginito ndi Zipangizo
Maginito amalumikizana ndi zinthu mwa kupanga mphamvu zokopa kapena zonyansa. Chinthu chokhala ndi maginito (monga chitsulo) chikayikidwa pafupi ndi mphamvu ya maginito, chimadutsa mu njira yotchedwa magnetic induction, komwe chimakhala ndi maginito kwakanthawi. Njirayi imaphatikizapo kulinganiza malo a maginito mkati mwa zinthuzo.
Magetsi amagetsi
Magetsi amagetsi ndi mtundu wa maginito omwe mphamvu yake ya maginito imatha kulamulidwa mwa kusintha mphamvu yamagetsi yomwe ikuyenda kudzera mu waya. Magetsi amagetsi ali ndi ntchito zosiyanasiyana, kuphatikizapo zipangizo zachipatala, ma mota amagetsi, ndi ma relay. Chimodzi mwa ubwino wawo ndi kuthekera kolamulira bwino mphamvu ya maginito ndikusintha mphamvu yake ngati pakufunika.
Maginito Okhazikika
Maginito okhazikika ndi maginito omwe amasunga mphamvu yake yamaginito kwa nthawi yayitali. Zipangizo monga alnico, neodymium, ndi samarium-cobalt ndi zitsanzo za maginito okhazikika omwe amagwiritsidwa ntchito kwambiri. Mphamvu ya maginito okhazikika imadalira zinthu zomwe zimapangidwa ndi izo komanso njira yopangira.
Zotsatira ndi Mavuto
Zotsatira zabwino
Kugwiritsa ntchito mphamvu ya maginito kwathandiza anthu ambiri. Kuyambira zothandizira kuyenda panyanja mpaka zipangizo zamakono zamakono mpaka ukadaulo wamankhwala wopulumutsa miyoyo, maginito asintha kwambiri moyo wathu. Kuphatikiza apo, kafukufuku ndi chitukuko m'munda wa mphamvu ya maginito zikupitiriza kutsegula mwayi watsopano muukadaulo ndi zatsopano.
Mavuto ndi Zolepheretsa
Komabe, kugwiritsa ntchito maginito kumakumananso ndi mavuto angapo. Zipangizo zomwe zimagwiritsidwa ntchito popanga maginito, makamaka maginito a rare earth, zitha kukhala zosowa komanso zodula. Kuphatikiza apo, kasamalidwe ka zinyalala zamaginito komanso momwe njira yopangira maginito imakhudzira chilengedwe ndizovuta kwambiri.
Mapeto
Magnetism ndi chinthu chofunikira kwambiri komanso chofala kwambiri, ndipo ntchito zake zimakhudza mbali zambiri za moyo wamakono. Kuyambira pomwe maginito achilengedwe adapezeka koyamba mpaka pakukula kwa ukadaulo wapamwamba, maginito akhala ndi gawo losasinthika. Pomvetsetsa momwe maginito amagwirira ntchito komanso momwe amagwiritsidwira ntchito, titha kuyamikira kwambiri zachilengedwezi ndikupitiliza kufufuza mphamvu zomwe sizikugwiritsidwa ntchito za maginito.
