Taw qhia ntawm electromagnet thiab cov hlau nplaum ruaj khov
Electromagnets thiab cov hlau nplaum ruaj khov yog ob hom hlau nplaum sib txawv. Ib lub tshuab hluav taws xob siv cov hlau nplaum uas tsim los ntawm kev xa hluav taws xob los ntawm lub kauj, thaum lub hlau nplaum ruaj khov siv cov hlau nplaum uas muaj los ntawm cov khoom siv hlau nplaum nyuaj. Electromagnets xav tau lub zog los tswj cov hlau nplaum, thaum cov hlau nplaum ruaj khov tsis muaj. Electromagnets feem ntau rub ntau dua li cov hlau nplaum ruaj khov, nrog cov hlau nplaum loj tshaj plaws kwv yees li 20 npaug zog dua li cov hlau nplaum ruaj khov.
Qee qhov piv txwv ntawm electromagnets yog solenoids, hluav taws xob motors, generators, thiab lwm yam. Qee qhov piv txwv ntawm cov hlau nplaum ruaj khov yog Neodymium Iron Boron, Samarium Cobalt, Alnico, Ferrite, thiab lwm yam. Ob hom hlau nplaum muaj ntau yam.siv tauhauv kev tshawb fawb, kev lag luam thiab lub neej txhua hnub.
Dab tsi yog electromagnet thiab nws ua haujlwm li cas?
Electromagnet yog ib qho khoom siv uas tsim hluav taws xob thaum muaj zog. Nws hloov lub zog hluav taws xob mus rau hauv lub zog sib nqus, thiab tom qab ntawd hloov lub zog sib nqus rau hauv lub zog kinetic. Lub hauv paus ntsiab lus ntawm kev ua haujlwm ntawm electromagnet yog: thaum lub coil yog energized, cov tub ntxhais hlau thiab lub armature yog magnetized los ua ob lub hlau nplaum nrog cov polarities opposite, thiab electromagnetic attraction yog generated ntawm lawv. Thaum lub zog nqus dej ntau dua li cov tshuaj tiv thaiv ntawm lub caij nplooj ntoos hlav, lub armature pib txav mus rau cov tub ntxhais hlau. Thaum tam sim no nyob rau hauv lub kauj yog tsawg tshaj li ib tug tej yam nqi los yog lub hwj chim mov raug cuam tshuam, lub electromagnetic attraction quab yuam yog tsawg tshaj li cov tshuaj tiv thaiv quab yuam ntawm lub caij nplooj ntoos hlav, thiab armature yuav rov qab mus rau qhov qub tso tawm txoj hauj lwm nyob rau hauv qhov kev txiav txim ntawm cov tshuaj tiv thaiv quab yuam. .
Lub electromagnet tsim hluav taws xob li cas?
Electromagnet yog ib qho khoom siv uas tsim hluav taws xob electromagnetism thaum nws muaj zog, thiab nws yog cov hlau nplaum tsis ruaj khov. Thaum lub coil yog energized, cov tub ntxhais hlau thiab lub armature yog magnetized los ua ob hlau nplaum nrog opposite polarities, thiab electromagnetic attraction yog generated ntawm lawv.
Thaum lub zog nqus dej ntau dua li cov tshuaj tiv thaiv ntawm lub caij nplooj ntoos hlav, lub armature pib txav mus rau cov tub ntxhais hlau. Thaum tam sim no nyob rau hauv lub kauj yog tsawg tshaj li ib tug tej yam nqi los yog lub hwj chim mov yog cuam tshuam, lub electromagnetic attraction quab yuam yog tsawg tshaj li cov tshuaj tiv thaiv quab yuam ntawm lub caij nplooj ntoos hlav, thiab lub armature rov qab mus rau nws thawj txoj hauj lwm.
Lub hauv paus ntsiab lus ntawm kev ua haujlwm ntawm electromagnet yog tsim kom muaj ib qho chaw sib nqus los ntawm lub kauj los ntawm kev siv hluav taws xob, thiab qhov chaw sib nqus no yuav ua rau lub zog ntawm cov khoom nyob ib puag ncig. Lub zog ntawm magnetic teb generated los ntawm electromagnet muaj feem xyuam rau qhov luaj li cas ntawm qhov ncaj qha tam sim no, tus naj npawb ntawm coil tig thiab cov khoom siv hlau nplaum nyob hauv qhov chaw. Thaum tsim cov khoom siv hluav taws xob, kev saib xyuas yuav raug them rau kev faib cov coil thiab xaiv cov khoom siv hlau nplaum, thiab qhov loj ntawm qhov ncaj qha tam sim no yog siv los tswj lub zog sib nqus.
Qhov zoo ntawm Energise-to-Hold Electromagnets
Tsuas yog txuas thaum muaj hluav taws xob tam sim no. Qhov sib txawv ntawm clamping quab yuam yog ua tau. Cov sib nqus clamping rog tuaj yeem nce tau yooj yim. Yooj yim rau-tawm kev ua haujlwm. Tej thaj chaw deb ua tau. Lub mount nyob rau hauv parallel kev twb kev txuas rau multiplying tuav quab yuam. Lub mounting configurations yog incredibly saj zawg zog: clamping rog tau
Electro-Permanent Magnet (Lub zog-rau-tso Electropermanent)
Lub zog tso tawm Electromagnet yog lub tshuab hluav taws xob tas mus li nrog cov solenoid coils thiab cov hlau nplaum nyob rau hauv cov khoom siv hlau zoo uas muab qhov zoo tshaj plaws clamp thiab tsis muaj zog. Nquag nws clamps thiab tsuas yog tso tawm yog tias siv tam sim no. Lub tog raj kheej no muaj lub zog tsim nyob rau hauv lub ci chrome tiav passivated rau lub cev. Armatures daim hlau los yog cov ntawv khaws cia yog muaj uas haum rau txhua qhov Energize Electromagnet Units. Nws muaj nyob rau hauv ob hom hluav taws xob connector, Energise-to-Release: Hirschman connectors Hirschman connectors.
Electromagnet ua haujlwm li cas
Lub hauv paus ntsiab lus ntawm kev ua haujlwm ntawm electromagnet yog siv lub zog coil los tsim cov hlau nplaum kom nyiam lossis tshem tawm cov khoom siv hlau nplaum, yog li ua tiav kev txav mus los. Cov qauv ntawm cov hlau nplaum feem ntau yog tsim los ntawm ib lub kauj, ib tug hlau core thiab armature.
Tom qab lub coil yog energized, cov tub ntxhais hlau thiab lub armature yog magnetized los ua ob hlau nplaum nrog opposite polarities, thiab electromagnetic attraction yog generated ntawm lawv. Thaum lub zog nqus dej ntau dua li cov tshuaj tiv thaiv ntawm lub caij nplooj ntoos hlav, lub armature pib txav mus rau cov tub ntxhais hlau. Thaum tam sim no nyob rau hauv lub kauj yog tsawg tshaj li ib tug tej yam nqi los yog lub hwj chim mov raug cuam tshuam, lub electromagnetic attraction quab yuam yog tsawg tshaj li cov tshuaj tiv thaiv quab yuam ntawm lub caij nplooj ntoos hlav, thiab armature yuav rov qab mus rau qhov qub tso tawm txoj hauj lwm nyob rau hauv qhov kev txiav txim ntawm cov tshuaj tiv thaiv quab yuam. .
Qhov kom zoo dua ntawm electromagnet yog tias nws tuaj yeem tswj tau qhov muaj lossis tsis tuaj thiab qhov loj ntawm cov hlau nplaum los ntawm kev tswj cov hluav taws xob tawm tam sim no, thiab nws tuaj yeem paub txog ntau hom kev txav xws li txoj kab ncaj nraim, kev sib hloov, thiab viav vias. Electromagnets yog dav siv nyob rau hauv kev lag luam, tsheb thauj mus los, kev kho mob thiab lwm yam kev lag luam, xws li motors, generators, cranes, electromagnetic relays, solenoid li qub, thiab lwm yam.
Piv txwv ntawm electromagnetshauv lub neej txhua hnub
Lub tshuab electromagnet yog ib yam khoom siv uas siv lub zog coil los ua kom muaj qhov sib nqus, uas tuaj yeem nyiam lossis tshem tawm cov khoom siv hlau nplaum kom ua tiav cov tshuab txav lossis tswj cov circuits. Electromagnets muaj ntau yam kev siv hauv lub neej, xws li:
Electromagnetic crane: Nws tuaj yeem siv los nqa cov khoom siv hlau xws li hlau, thiab siv lub tshuab hluav taws xob los tswj qhov muaj thiab qhov loj ntawm cov hlau nplaum.
Electromagnetic relay: Nws yog qhov hloov pauv tsis siv neeg tswj los ntawm electromagnet, uas tuaj yeem tswj tau qhov hluav taws xob siab thiab muaj zog tam sim no nrog qis voltage thiab tsis muaj zog tam sim no kom paub txog kev ua haujlwm ntev.
Electromagnetic chuck: Ib hom kev tsim khoom raws li lub hauv paus ntsiab lus ntawm electromagnetism, los ntawm energizing lub internal coil los tsim magnetic quab yuam, dhau los ntawm lub magnetic conduction vaj huam sib luag, nruj nreem nqus lub workpiece uas kov lub nto ntawm lub vaj huam sib luag, thiab demagnetizing los ntawm lub hwj chim tawm ntawm lub kauj, thiab lub zog sib nqus ploj mus, thiab tshem tawm lub workpiece. tshuab cuab yeej accessories
Maglev tsheb ciav hlau: Nws yog lub tsheb ciav hlau ceev uas raug tshem tawm thiab tsav los ntawm cov hlau nplaum uas tsim los ntawm electromagnets. Nws tuaj yeem ncav cuag qhov ceev ntawm ntau tshaj 500 kilometers ib teev, thiab muaj qhov zoo ntawm kev ceev ceev, tsis tshua muaj suab nrov, thiab muaj kuab paug tsawg.
Electromagnetic Chuck:Electromagnetic chucks feem ntau muaj qib siab ntawm kev tuav quab yuam, ua rau lawv zoo tagnrho rau kev ua haujlwm nyuaj thiab muag heev.
Loudspeaker: Nws yog ib qho cuab yeej uas hloov cov teeb liab hluav taws xob mus rau hauv acoustic signals. Nws yog tsuas yog tsim los ntawm cov hlau nplaum ruaj khov, ib lub kauj thiab lub khob hliav qab daim ntawv lub khob hliav qab. Thaum lub suab tam sim no dhau los ntawm lub kauj, lub kauj yog vibrated los ntawm lub zog ntawm lub magnetic teb, tsav cov ntawv lub khob kom emit suab.
Cov khoom siv hauv tsev: xws li lub tub yees, lub tshuab nqus tsev, lub tshuab ntxhua khaub ncaws, lub tshuab ntxhua khaub ncaws, thiab lwm yam, txhua yam siv hluav taws xob los tswj cov keyboards, li qub lossis cov khoom tsav tsheb.
Cov hlau nplaum ruaj khov yog dab tsi?
Cov hlau nplaum tas mus li yog ib qho kev faib tawm ntawm cov hlau nplaum. Cov hlau nplaum uas muaj peev xwm tswj tau lawv cov hlau nplaum ntev ntev yog hu ua cov hlau nplaum ruaj khov, uas yog cov hlau nplaum ruaj khov, xws li cov hlau nplaum ntuj (magnetite) thiab cov hlau nplaum dag (alnico), thiab lwm yam. Los ntawm "mus tas li," nws txhais tau hais tias cov khoom siv ruaj khov. magnetic teb uas tsis muaj kev pab sab nraud. Cov yam ntxwv ntawm txhua yam khoom sib nqus ua li ntawd yog hu ua retentivity . Cov ntaub ntawv ferromagnetic tau yooj yim magnetized. Cov ntaub ntawv paramagnetic yog magnetized nrog nyuaj dua. Cov ntaub ntawv diamagnetic tiag tiag yuav tiv thaiv cov hlau nplaum sab nraud los ntawm kev sib nqus ntawm qhov sib txawv. Cov hlau nplaum tas mus li Nws yog hu ua cov hlau nplaum nyuaj, uas tsis yooj yim rau plam magnetization lossis magnetization. Ib qho hlau nplaum ruaj khov txhais tau hais tias thaum nws yog hlau nplaum, nws cov hlau nplaum muaj cov yam ntxwv uas nws nyuaj rau poob, uas yog, tom qab cov hlau nplaum tas mus li yog hlau nplaum rau saturation, yog tias cov hlau nplaum sab nraud raug tshem tawm, cov hlau nplaum loj yuav raug tsim nyob rau hauv. qhov sib txawv ntawm ob tug ncej ntawm cov hlau nplaum, muab lub zog sib nqus zoo rau lub ntiaj teb sab nraud.
Permanent Magnetism Lub ntsiab lus
Permanent yog ib lo lus uas hais txog ib yam dab tsi uas muaj kev mus tas li. Cov hlau nplaum tas mus li yog qhov tseem ceeb ntawm cov khoom sib nqus uas khaws nws cov hlau nplaum thaum tshem tawm thiab tshem tawm cov sib nqus sib nqus, uas tshwm sim yog tias muaj qhov sib nqus ntawm qhov sib thooj rau nws. Daim duab hauv qab no piav qhia txog cov khoom sib txawv ntawm cov hlau nplaum thiab cov hlau nplaum ruaj khov. Lub electromagnet yog tsim los ntawm ib tug hlau uas ua raws li cov hlau nplaum raws li cov hluav taws xob tam sim no dhau los ntawm cov xov hlau. Cov ntsiab lus.
Cov hlau nplaum ruaj khov tuaj yeem muab faib ua ob pawg
Thawj qeb yog hlau alloy mus tas li cov khoom sib nqus, suav nrog NdFeB, SmCo thiab AlNiCo.
NdFeB cov khoom sib nqus: tseem hu ua cov hlau nplaum muaj zog lossis hlau nplaum huab tais, cov hlau nplaum ruaj khov nrog kev ua haujlwm siab tshaj plaws hauv kev lag luam kev lag luam tam sim no muaj zog sib nqus kev ua tau zoo, kev ua haujlwm siab, kev ntxhib los mos thiab kev ua haujlwm siab, yog li nws tau siv dav. Qhov tsis zoo yog tias nws yooj yim rau oxidize thiab corrode, thiab saum npoo xav tau electroplating ua.
Samarium cobalt hlau nplaum: Muaj ob hom raws li lawv qhov sib txawv, SmCo5 thiab Sm2Co17. Cov khoom siv hluav taws xob sib nqus siab (14-28MGOe), siab quab yuam, muaj zog kub tsis kam, tsim nyog rau qhov kub thiab txias ua haujlwm. Qhov tsis zoo yog tus nqi kim.
AlNiCo hlau nplaum: cov hlau nplaum muaj xws li txhuas, npib tsib xee, cobalt, hlau thiab lwm yam khoom siv hlau, nrog rau kev ua haujlwm zoo, qhov qis tshaj qhov kub thiab txias coefficient, thiab kev ua haujlwm kub tuaj yeem siab txog 600 degrees Celsius. Muaj ntau yam kev siv dav dav ntawm ntau yam twj paj nruag thiab meters.
Qhov thib ob ntawm cov hlau nplaum ruaj khov yog ferrite cov hlau nplaum ruaj khov.
Ferrite hlau nplaum: Tsim los ntawm cov cuab yeej siv hluav taws xob ceramic, kev ntxhib los mos, muaj zog kub tsis kam, tus nqi pheej yig, feem ntau siv. Qhov tsis zoo yog qhov kev ua haujlwm sib nqus yog qhov nruab nrab thiab qhov ntim loj.
Lub hauv paus ntsiab lus ua haujlwm ntawm cov hlau nplaum ruaj khov
Thaum tus neeg xyuas pib rotor thiab cov hlau nplaum ruaj khov rotor txav mus rau ib leeg, tus neeg xyuas pib rotor txiav cov kab hluav taws xob sib nqus, thiab qhov cuam tshuam tam sim no yog tsim nyob rau hauv tus neeg xyuas pib rotor, uas nyob rau hauv lem generates induced magnetic teb, uas interacts nrog magnetic teb. tsim los ntawm cov hlau nplaum ruaj khov rotor muaj nuj nqi, kom paub txog qhov sib kis ntawm ob qho tib si.
Piv txwv ntawm cov hlau nplaum ruaj khov hauv lub neej txhua hnub
Cov hlau nplaum tas mus li muaj ntau yam kev siv hauv peb lub neej txhua hnub. Nov yog qee qhov piv txwv:
Hluav taws xob tsheb: Cov hlau nplaum tas mus li tuaj yeem siv rau hauv lub tshuab hluav taws xob los ua kom muaj zog sib hloov.
Sib Nqus phaib: Sib nqus kab txaij hauv tej yam xws li daim npav rho nyiaj thiab daim npav ID siv cov hlau nplaum ruaj khov los khaws cov ntaub ntawv.
Magnetic Chuck: Sib nqus chuck yog ib hom khoom siv los tuav cov ntaub ntawv ferrous nyob rau hauv qhov chaw thaum machining thiab vuam. Nws muaj cov khoom siv hluav taws xob los yog cov hlau nplaum ruaj khov uas tau teem rau hauv cov duab plaub, uas tuaj yeem qhib los yog de-activated kom ruaj ntseg cov khoom hauv qhov chaw.
Cov khoom ua si: Ntau cov khoom ua si siv cov hlau nplaum ruaj khov, xws li cov duab dhos ua si, lub voos xwmfab, thiab lwm yam.
Qhov sib txawv ntawm electromagnets thiab cov hlau nplaum ruaj khov
Cov hlau nplaum tas mus li yog tsim los ntawm cov khoom siv uas muaj cov qauv sib nqus sab hauv, xws li hlau lossis hlau. Ib qho electromagnet yog ib hom hlau nplaum uas cov hlau nplaum yog tsim los ntawm hluav taws xob tam sim no. Electromagnets yog cov hlau nplaum ib ntus thiab xav tau lub zog hluav taws xob los tsim lawv qhov chaw sib nqus. Qhov sib txawv tseem ceeb ntawm lub tshuab hluav taws xob thiab cov hlau nplaum ruaj khov yog tias cov hlau nplaum tsim los ntawm lub tshuab hluav taws xob tuaj yeem hloov mus rau thiab tawm, thaum lub chaw sib nqus ntawm cov hlau nplaum ruaj khov yog ib txwm muaj. Lub zog ntawm electromagnet lub zog magnetic teb kuj tuaj yeem hloov pauv los ntawm kev hloov cov nyiaj hluav taws xob uas ntws los ntawm nws. Cov hlau nplaum tas mus li muaj zog sib nqus ntau dua li cov hlau nplaum thiab tuaj yeem siv los nqa cov khoom hnyav dua li cov hlau nplaum. Txawm li cas los xij, cov hlau nplaum ruaj khov tsis tuaj yeem hloov mus rau thiab tawm zoo li lub tshuab hluav taws xob, yog li lawv tsis tshua muaj txiaj ntsig hauv cov ntawv thov uas yuav tsum tau tswj cov hlau nplaum.
Lwm qhov sib txawv ntawm ob hom hlau nplaum yog qhov sib nqus ntawm cov hlau nplaum ruaj khov tuaj yeem cuam tshuam nrog ib leeg, thaum cov hlau nplaum ntawm electromagnets tsis ua. Cov hlau nplaum tas mus li nyiam thiab tawm tsam ib leeg, tso cai rau lawv siv rau ntau yam kev siv xws li motors, generators thiab loudspeakers. Electromagnets tsis cuam tshuam nrog ib leeg hauv txoj kev no, yog li lawv tsis tsim nyog rau hom kev siv no.
Thaum kawg, cov hlau nplaum ruaj khov feem ntau pheej yig dua thiab yooj yim dua kom tau txais cov khoom siv hluav taws xob, ua rau lawv tsim nyog rau qee qhov kev siv. Ntawm qhov tod tes, electromagnets tuaj yeem tsim los tsim cov hlau nplaum muaj zog heev, tso cai rau kev siv ntau yam hauv kev lag luam xws li hluav taws xob thiab kev tsim khoom.
Qhov twg yog qhov muaj zog electromagnet lossis hlau nplaum ruaj khov?
Ob leeg electromagnets thiab cov hlau nplaum tas mus li muaj lawv tus kheej qhov zoo thiab qhov tsis zoo. Lub tshuab hluav taws xob tuaj yeem hloov lub zog ntawm qhov chaw sib nqus los ntawm kev hloov pauv tam sim no, yog li kev hloov kho magnetic teb tuaj yeem pom tau. Txawm li cas los xij, cov khoom siv hluav taws xob siv hluav taws xob los tswj cov chaw sib nqus, yog li yuav tsum muaj lub zog hluav taws xob sab nraud. Hauv qhov sib piv, cov hlau nplaum ruaj khov tsis tas yuav muaj lub zog hluav taws xob sab nraud thiab yog li ntawd muaj zog ntau dua. Txawm li cas los xij, lub zog sib nqus ntawm cov hlau nplaum ruaj khov yog ruaj khov thiab tsis tuaj yeem hloov kho.
Los ntawm txhua yam ntawm lub rooj tsavxwm, kev nyab xeeb thiab kev txuag hluav taws xob ntawm lub tshuab electromagnet yog qis dua li cov hlau nplaum ruaj khov, thiab cov nqi tu ntawm cov hlau nplaum ruaj khov yog tsawg, thiab kev khiav hauj lwm thiab kev siv kuj yooj yim, tab sis cov hlau nplaum tseem muaj. nws qhov tshwj xeeb zoo, tus nqi qis, thiab tus nqi qis dua li cov hlau nplaum ruaj khov. Tsis tas li ntawd, nyob rau hauv ib lub sijhawm tshwj xeeb, qhov tob ntawm cov hlau nplaum kuj tseem tob dua li ntawm cov hlau nplaum electro-permanent. Piv txwv li, electromagnets yuav tsum tau nqus thiab nqa cov khoom seem steel thiab bundled seem steel.
Qhov txawv ntawm Electromagnet thiab Permanent Magnet
Parameters Electromagnet Permanent Magnet Sib Nqus Fields Strength Electro Magnets Field Strength yuav hloov. Lub sij hawm mus tas li implies mus tas li thiab nws muaj zog magnetic teb. Magnet teb. Temporal, ruaj khov magnetism quab yuam. Sib nqus teb nyob rau hauv electromagnets muaj zog. Sib nqus teb thiab sib nqus rog muaj qhov tsis muaj zog tshaj li electrons. Hloov magnetic teb. Sib nqus teb ntawm cov khoom siv hluav taws xob tuaj yeem hloov kho los ntawm kev kho cov hluav taws xob flux. Sib nqus teb tsis tuaj yeem hloov pauv vim lawv nyob tas li. Magnetism. Kev quab yuam
Yuav ua li cas yog ib tug electromagnet txawv los ntawm ib tug mus tas li hlau nplaum quizizz?
Electromagnet yog ib qho khoom siv hluav taws xob uas tsim los ntawm ib lub coil ntawm cov hlau uas tsim ib qho chaw sib nqus thaum tam sim no dhau los ntawm nws. Cov hlau nplaum ruaj khov muaj nws tus kheej sab hauv magnetic teb, thiab tsis tas yuav muaj lub zog sab nraud los tsim ib qho.
Qhov sib txawv tseem ceeb ntawm ob hom hlau nplaum no yog tias lub tshuab hluav taws xob tuaj yeem hloov pauv lossis tawm txhua lub sijhawm, thaum lub chaw sib nqus ntawm cov hlau nplaum ruaj khov yog ib txwm muaj. Electromagnets tseem tuaj yeem tsim cov qib sib nqus ntau dua li cov hlau nplaum ruaj khov, ua rau lawv muaj txiaj ntsig zoo rau ntau yam kev siv. Txawm li cas los xij, cov hlau nplaum tas mus li muaj peev xwm sib cuam tshuam nrog ib leeg thiab tsim cov khoom siv dag zog thaum muab tso rau ib leeg, uas ua rau lawv zoo tagnrho rau kev siv cov motors thiab generators.
Xaus
Qhov sib txawv ntawm Electromagnet thiab Permanent Magnet Qhov sib txawv loj ntawm electromagnet thiab cov hlau nplaum ruaj khov yog qhov qub tuaj yeem muaj cov hlau nplaum thaum hluav taws xob ntws los ntawm nws thiab ploj mus thaum qhov ntws ntawm qhov tam sim no nres. Ntawm qhov tod tes, cov hlau nplaum tas mus li yog tsim los ntawm cov khoom sib nqus uas yog magnetized thiab nws muaj nws tus kheej magnetic teb. Nws yuav nco ntsoov qhia tus cwj pwm sib nqus. Qhov sib txawv ntawm Electromagnet thiab Permanent Magnet Raws li lub npe.Lawv yuav muaj North thiab South Ncej, thiab ob leeg yuav muaj lawv cov magnetic teb cuam tshuam nrog lwm qhov chaw ntawm magnetic teb thiab cov ntaub ntawv uas nthuav tawm cov khoom sib nqus. Txawm li cas los xij, Electromagnets txawv ntawm cov hlau nplaum tas li los ntawm lawv lub peev xwm los tsim cov hlau nplaum thaum hluav taws xob ntws los ntawm lawv. Nyob rau hauv sib piv, cov hlau nplaum ruaj khov yog raws li lub npe qhia, mus tas li magnetized. Lawv tsis xav tau hluav taws xob tam sim no los tsim cov hlau nplaum.