Cov lus sau ntawm cov hlau nplaum yog ib qho me me xws li hlau, cobalt, los yog xee caj dab. Sab hauv cov qauv ntawm cov atom kuj zoo ib yam, thiab nws muaj lub caij sib nqus. Cov hlau nplaum muaj peev xwm tsim tau hlau nplaum thiab thaj yeeb los ntawm cov khoom siv ferromagnetic xws li hlau, xauv npo, thiab cobalt.
Cov hlau nplaum: Lub pas dej ua ke, cov hlau nplaum, cov nplais pob zeb, cov hlau nplaum, cylindrical magnets, nplhaib nplhaib, wafer hlau nplaum, nplais hlau nplais hlau, hlau nplaum magnetic.
Nqa cov hlau nplaum: hlau zeb hlau, hlau nplaum, hlau nplaum hlau, hlau nplaum, hlau nplaum, hlau nplaum, hlau nplaum , thiab lwm yam. Lub hlau nplaum faib rau cov hlau nplaum thiab cov hlau nplaum muag. Cov hlau nplaum tas li yog cov hlau nplaum kom cov hlau nplaum ntawm lub tshuab hluav taws xob thiab qhov sib zog ntawm lub electron yuav tsum tau ua nyob rau hauv qhov chaw ruaj khov, thiab lub tshuab nqus hlau nplua nuj. (Nws tseem yog ib txoj hauv kev ntxiv dag zog ntawm kev sib nqus.) Thaum lub sij hawm raug tshem tawm, cov hlau mos yuav qeeb nws cov khoom sib nqus. Qhov nruab nrab ntawm cov kab txaij hlau nplaum yog tshem tawm ntawm txoj hlua hlau. Thaum nws tseem nyob ruaj ruaj, nws ob hnub mus rau sab qab teb thiab sab qaum teb ntawm lub ntiaj teb. Qhov kawg taw rau sab qaum teb yog hu ua qaum teb ncej lossis qaum teb, thiab qhov kawg taw rau sab qab teb yog tus qauv taw qhia los yog S. Pole.
Yog hais tias lub ntiaj teb xav tias yog ib qho loj cov hlau nplaum, lub ntiaj teb no geomagnetic North Pole yog tus qauv qhia txoj kab, thiab Geomagnetic South Pole yog North Pole. Nruab nrab ntawm cov hlau nplaum thiab cov hlau nplaum, lub sib nqus ncej ntawm tib lub npe yog repelled, thiab qhov sib nqus ncej ntawm tib lub npe yog attracted. Yog li ntawd, lub compass yog repelled los ntawm South Ncej, sab qaum teb xub yog repelled los ntawm North Pole, thiab lub compass yog attracted rau North Pole. Kev faib tawm: Cov hlau nplaum yuav muab faib ua "Tshaj Lawm Eternal" thiab "Non-Eternal Magnets". Cov hlau nplaum tas li tuaj yeem yog ib yam khoom xeeb, uas zoo li lub ntuj hlau, lossis nws tuaj yeem siv los ntawm tes. Non-cov hlau nplaum, xws li electromagnets, tsuas pom muaj hlau nplaum hauv qee qhov kev mob.
