Magnetic Field vs Magnetic Force
Magnetism yog ib yam khoom tseem ceeb ntawm cov teeb meem uas yog siv rau hauv ntau cov ntawv thov. Sib nqus teb yog lub zog ntawm cov hlau nplaum tsim los ntawm cov hlau nplaum, qhov sib nqus quab yuam yog lub zog vim yog ob yam khoom sib nqus. Lub ntsiab lus ntawm magnetic teb thiab magnetic quab yuam yog dav siv nyob rau hauv teb xws li classical mechanics, electromagnetic theory, field theory thiab ntau yam kev siv. Nyob rau hauv tsab xov xwm no, peb yuav tham txog dab tsi magnetic teb thiab magnetic quab yuam yog, lawv cov ntsiab lus, kev siv ntawm ob, zoo sib xws thiab thaum kawg qhov sib txawv ntawm magnetic teb thiab magnetic quab yuam.
Magnetic Field
Magnets tau tshawb pom los ntawm Suav thiab Greeks nyob rau lub sijhawm 800 BC. mus txog 600 B. C. Xyoo 1820 Hans Christian Oersted, ib tus kws kho mob Danish tau tshawb pom tias tam sim no nqa cov hlau ua rau lub koob koob mus rau sab xis ntawm cov hlau. Qhov no yog hu ua induction magnetic teb. Ib qho chaw sib nqus yog ib txwm tshwm sim los ntawm kev txav mus los (piv txwv li lub sijhawm sib txawv hluav taws xob). Cov hlau nplaum tas mus li yog qhov tshwm sim ntawm electron spin ntawm atoms sib txuas ua ke los tsim cov net magnetic teb. Yuav kom nkag siab txog lub tswvyim ntawm magnetic teb ib tug yuav tsum xub to taub lub tswvyim ntawm magnetic teb kab. Cov kab hlau nplaum sib nqus lossis cov kab sib nqus ntawm cov rog yog ib txheej ntawm cov kab uas xav tau los ntawm N (sab qaum teb) ncej ntawm cov hlau nplaum mus rau S (sab qab teb) ncej ntawm cov hlau nplaum. Hauv kev txhais cov kab no yeej tsis hla ib leeg tshwj tsis yog qhov sib nqus qhov sib nqus yog xoom. Nws yuav tsum raug sau tseg tias cov kab sib nqus ntawm lub zog yog lub tswv yim. Lawv tsis muaj nyob hauv lub neej tiag. Nws yog ib qho qauv uas yooj yim los sib piv cov hlau nplaum zoo. Lub magnetic teb yog qhov kev faib tawm ntawm cov kab sib nqus no. Lub zog magnetic teb ntawm ib qho chaw yog proportional rau lub magnetic teb kab ceev ntawm qhov point. Sib nqus teb kuj tseem hu ua magnetic flux ntom.
Magnetic Force
Magnetic force yog lub zog uas tsim los ntawm ob lub hlau nplaum. Ib lub hlau nplaum tsis tuaj yeem tsim lub zog sib nqus. Sib nqus rog yog tsim thaum cov hlau nplaum, cov khoom sib nqus, lossis cov xaim nqa tam sim no muab tso rau ntawm qhov chaw sib nqus sab nraud. Cov quab yuam vim cov hlau nplaum tsis sib xws yog ib qho yooj yim los xam, tab sis cov quab yuam vim cov hlau nplaum tsis sib xws yog qhov nyuaj. Sib nqus rog yog ntsuas hauv Newton. Cov zog no yeej ib txwm sib koom.
Dab tsi yog qhov sib txawv ntawm Magnetic Field thiab Magnetic Force?
• Tsuas yog ib qho hlau nplaum nkaus xwb thiaj li tsim tau ib qho chaw sib nqus. Yam tsawg kawg yog ob lub hlau nplaum yuav tsum muaj tam sim no los tsim ib qho chaw sib nqus.
• Sib nqus teb yog ntsuas hauv tesla lossis gauss, qhov sib nqus quab yuam yog ntsuas hauv newton.
• Muaj ob hom magnetic teb hu ua B teb thiab H teb, tab sis tsuas muaj ib hom magnetic force.
