Permeability The magnetic oo ah walaxda

Xidhiidhka ka dhexeeya duurka ku magnetic (H) iyo cufnaanta magnetic ka daadanayo (B) ee wax lagu gartaa tiro jirka yeedhay permeability magnetic. buuxda magnetic permeability ee dhexdhexaad ah - ratio of B si H. Sida laga soo xigtay System Caalamiga ah ee Cutubyada waxaa lagu cabiraa unugyada loo yaqaan 1 Henry halkii mitir.

Qiimaha A tiro ka muujiyey by ratio ee ay magnitude inay baaxadda ay permeability magnetic of vacuum oo waxaa muujinaysaa by μ. qiimaha Tan waxaa lagu magacaabaa qaraabada magnetic permeability (ama permeability) ee dhexdhexaad ah. Sidee waa qaraabo, waxa uu leeyahay halbeeg lahayn.

Sidaa darteed, qaraabada μ permeability magnetic - qiimaha muujinaya jeer sida badan oo duurka induction ee dhexdhexaad ah ee ka yar (ama ka badan) oo duurka magnetic induction vacuum ah.

Markii loo feydo walaxda, waxa uu noqonayaa mid magnetized beerta dibadda magnetic. Sidee tani u dhici? Sida laga soo xigtay la xiqiijiyay of Ampere, in wax kasta oo joogto ah wareegaya hadda korontada cqaadir sababa dhaqdhaqaaqa electrons in Galaatiya iyo joogitaanka iyaga u gaar ah daqiiqad magnetic. Under xaaladaha caadiga ah, dhaqdhaqaaqa this waa Fasaadi, oo beerta "demiyey" (diido) kasta oo kale. Marka u geliya jidhka duurka dibadda gagadoonka hadda, jidhkuna waa ka noqdo magnetized (m. E. Lahaanshaha berrinkeeda).

walxaha dhan permeability waa kala duwan. Iyada oo ku saleysan qiimaha oo dhan, qeybinta mowduuca saddex kooxood oo waaweyn.

In qiimaha diamagnetic of μ permeability magnetic - a yar yar hal. Tusaale ahaan, bismuth μ = 0,9998. By diamagnetic waa zinc, lead, quartz, cusbo leh dhagaxayga weyn, copper, dhalooyinka, hydrogen, benzene, biyo.

permeability The magnetic of unugyada wax yar ka weyn paramagnetic (waayo, μ = 1,000023 aluminium). Tusaalooyinka paramagnetic - nickel, oxygen, tungsten, ebonite, platina, nitrogen, hawada.

Ugu dambeyntii, koox saddexaad iska leh tiro ka mid ah walxaha (badanaa Biraha iyo Alloys), kuwaas oo magnetic permeability si weyn u yahay (by dhowr amarada baaxaddeeda) ka badan midnimada. Waxyaabahani - ferromagnets. Asal ahaan halkan waxaa ka mid ah nickel, birta, Cobalt iyo Alloys ay. Waayo, steel μ = 8 ∙ 10 ^ 3 daawaha nickel-birta μ = 2.5 ∙ 10 ^ 5. Ferromagnetic hantiyi guryaha oo iyaga la kala saaro walxaha kale. Marka hore, waxay leeyihiin magnetism ah haraaga ah. Marka labaad, iyagoo permeability waa shaqo ah induction dibadda ee beerta. Third, waayo, mid kasta oo iyaga ka mid ah waxaa jira heerkul ah marinka gaar ah, loo yaqaan dhibic Curie ee taas waa lumin doonaa hantida ferromagnetic oo uu noqdo paramagnetic. Waayo, dhibic Curie nickel - 360 ° C, birta - 770 ° C.

The sifooyinka ferromagnets go'aamiso permeability ma aha oo kaliya, laakiin sidoo kale waxaan baaxadda, loo yaqaan magnetization ah oo ah walaxda. Tani waa hawl adag oo Fansaarada induction magnetic, koritaanka waxaa lagu tilmaamay line magnetization yeedhay qalooca magnetization. Sayidka, isagoo gaadhay heer gaar ah, magnetization ah ficil ahaan uu joogsanayo si loo kordhiyo (robab magnetic dhacdaa). qiimaha baaqday magnetization ferromagnetic ka magnitude sii kordhaysa ee induction field magnetic dibadda waxaa lagu magacaabaa hysteresis. Xaaladdan oo kale, waxaa jira tiirsanaanta ah ferromagnet ka mid ah sifooyinka magnetic ma aha oo kaliya ay gobolka la joogo, laakiin sidoo kale ay magnetization hore. garaafka fansaarka qalooca tani waxaa la yiraahdaa loop hysteresis.

Sababo la xiriira hantida, agabka ferromagnetic caadi ahaan loo isticmaalo in farshaxanka. Waxay waxaa loo isticmaalaa in rotors of matoorrada iyo matoorrada, in soo saaridda ee diirkja transformer iyo Relays electromagnetic, in soo saaridda ee alaabta kombiyuutarada electronic. The guryaha magnetic of qalabka ferromagnetic waxaa loo isticmaalaa in rikoorrada cajalad, teleefonada, cajalad iyo warbaahinta kale lagu kaydiyo.