Lus Qhia Txog Kev Khuv Xim
Lub cim ntawm Kev Ncaj Ncees yog Br, uas txhais tau tias tom qab cov hlau nplaum yog magnetized mus rau kev kub siab, qhov chaw sib nqus sab nraud tau raug tshem tawm, thiab qee qhov ntsuas ntawm qhov sib nqus tseem tuaj yeem tswj tau nyob rau hauv thawj qhov kev coj ntawm sab nraud magnetic teb. Cov txiaj ntsig tsis tshua muaj nqi ntawm kev nco qab yog kev sib txuam ntawm lub ntsej muag. Qhov nco qab ntawm cov khoom siv hlau nplaum ruaj khov yog qhov cuam tshuam los ntawm kev qhia ntawm txhua qhov siv lead ua thiab cov khoom siv sib nqus hauv cov khoom siv.