Lub magnetic teb thiab nws lub ntsiab yam ntxwv

Ib tug ntawm cov tseem ceeb tshaj plaws lub cev yam ntxwv ntawm ob yam thiab dag tib neeg ib puag ncig yog cov magnetic teb. Nws yog ib daim ntawv ntawm cov hav zoov ntawm cov electromagnetic teb. Lub ntsiab feature ntawm daim ntawv no yog hais tias lub magnetic teb ua xwb nyob rau cov neeg hais thiab lub cev, uas, nyob rau hauv ib tes, yog nyob rau hauv tas mus li lub zog, thiab nyob rau lwm yam - comprise ib lub hluav taws xob xwb.

Lwm chav kawm ntawm physics peb paub tias rau ntawm generating ib tug sib nqus teb tsim nyog tam sim no-nqa neeg xyuas pib thiab alternating hluav taws xob teb. Qhov tseem ceeb tshaj yam ntxwv ntawm daim teb no yog cov magnetic induction thiab sib nqus zog.

Lub magnetic teb muab ib tug ntawm cov vector ntau kawm nyob rau hauv physics, uas muaj txog cov electromagnetic induction vector sib txawv thiab cov magnetization vector. Txij li thaum lub sib nqus siv muaj tus nqi vector, ces nws tsev ntawm kev ntsuas nyob rau hauv cov pa thiab feem ntau SI yog suav tias yog amperes ib 'meter'. Yuav kom tau txais cov kev electromagnetic teb siv thiab qhov ntau ntawm 1 / m, nws yog tsim nyog tias nyob rau hauv ib ncua rectilinear hlau nrog ib lub cheeb raws li me me li sai tau ntws hluav taws xob tam sim no feem 2π hwj chim amp. Nyob rau hauv cov ntaub ntawv no rau tag nrho cov ntsiab lus tsim los ntawm magnetic teb tam sim no ntawm 1 'meter' thiab ib tug electromagnetic teb siv yog sib npaug zos rau 1 A / m.

Lub magnetic teb, nyob rau hauv lwm yam lus, cov kab ntawm kev quab yuam ntawm cov teb yuav kwv yees. Nyob rau hauv kev, los mus txiav txim cov kev taw qhia ntawm cov kab, koj yuav siv tau lub zoo-paub ntau tshaj qhov txoj cai-tes txoj cai. Qhov no txoj cai - ib yam ntawm cov cornerstones ntawm tag nrho hluav taws xob engineering. Nws hais tias nyob rau hauv cov ntaub ntawv uas yog tag nrho cov orientation ntawm tus ntiv tes xoo tsa suab kiag tib yam nrog cov kev taw qhia ntawm hluav taws xob tam sim no nyob rau hauv ib tug neeg xyuas pib, cov kev taw qhia kev sib hloov ntawm ntiv tes xoo ntawm yog zoo tib yam rau cov kev taw qhia ntawm magnetic teb kab.

Tsom on txoj cai no, nws yog ib qho yooj yim los ua pov thawj hais tias magnetic kab uas tshwm sim nyob rau hauv lub lem ntawm lub kauj yog qhia nyob rau hauv tib txoj kev coj. Los ntawm no nws yuav tsum xaus lus tias tus magnetic teb hauv lub kauj yuav muaj zog tshaj li cov kev siv los ntawm ib tug tig. Qhov no yog vim nrog lub fact tias cov kab ntawm kev quab yuam ntawm ib sab lem yog thaum uas tig mus rau txhua lwm yam tab sis nyob rau hauv txawv kev qhia, yog li ntawd, lub magnetic teb lub dag lub zog ntawm lawv yuav tsis tshee txo.

Nws yog tej yam ntuj tso tau hais tias lub magnetic teb ntawm txhua kauj yog ncaj qha xwm yeem mus rau lub dag lub zog ntawm qhov tam sim no uas kis los ntawm tus lem. Nyob rau hauv tas li ntawd, lub magnetic teb lub dag lub zog yog nyob ntawm seb zoo cov windings cov txheej txheem txheeb ze rau txhua tus lwm yam. Empirically, nws yog muaj pov thawj hais tias nyob rau hauv ob coils nyob rau hauv uas hluav taws xob tam sim no ntws tib lub dag lub zog, thiab tus naj npawb ntawm lem kiag coincide, lub magnetic teb yog muaj zog tshaj ib tug nyob qhov twg cov kauj muaj ib tug me me axial ntev, i.e. rau koj lem npaum li cas los ze zog mus rau txhua lwm yam.

Ib tug heev tseem ceeb cov yam ntxwv ntawm lub magnetic teb yog ib tug hais txog zauv tus nqi ntawm ampere-lem, uas yuav tsum tau muab xam rau hauv lub xov tooj ntawm koj lem nyob rau hauv lub kauj rau ntawm lub hwj chim ntawm tus tam sim no ntws nyob rau hauv lawv. thiab lub magnetomotive quab yuam yuav yog nyob ntawm seb tus nqi ntawm ampere-lem. Raws li cov tswvyim no, nws yog ib qho yooj yim los qhia hais tias tus magnetic teb ntawm txoj kev tshawb ntawm cov kauj yog ncaj qha proportional rau tus xov tooj ntawm ampere-lem ib chav tsev ntawm axial ntev. Nyob rau hauv lwm yam lus, lub electromagnetic teb siv yog ntau dua, ntau dua qhov lub magnitude ntawm lub magnetomotive quab yuam generated nyob rau hauv lub xeem kauj.

Dhau li artificially generated magnetic teb, muaj ib tug tej yam ntuj tso ntiaj teb magnetic teb, uas yog tsim nyob rau mas nyob rau hauv tus txheej plhaub ntawm lub nucleus. Main yam ntxwv ntawm daim teb no, xws li nro, sib txawv ob leeg nyob rau lub sij hawm thiab nyob rau hauv qhov chaw, tab sis tag nrho cov yooj yim cov kev cai cov yam ntxwv ntawm lub artificially tsim teb, thiab muaj nyob rau hauv lub geomagnetic teb.