Amandla Kamagnetic Entanjeni Ethwala Amandla
Ukusetshenziswa kwamandla kazibuthe entanjeni ethwala ugesi kungumqondo oyisisekelo ku-electromagnetism, igatsha le-physics. Lesi simo saqala ukutholwa nguHans Christian Ørsted ngo-1820 lapho eqaphela ukuthi ugesi ogeleza ngocingo uthinta inalithi yekhampasi eseduze. Lokhu kutholwa kwabonisa ubudlelwano obuseduze phakathi kukagesi ne-magnetism, okwathi kamuva kwathuthukiswa ososayensi abanjengo-André-Marie Ampère noMichael Faraday.
Kulesi sihloko, sizoxoxa ngezimiso eziyisisekelo zamandla kazibuthe entanjeni ethwala ugesi, ukuthi la mandla asebenza kanjani, imithetho eyisisekelo yefiziksi, kanye nezinye izinhlelo zokusebenza ezibonisa ukuthi lo mqondo unethonya elingakanani empilweni yansuku zonke.
Izimiso Eziyisisekelo Zamandla Amagnetic
Uma ugesi ugeleza ngentambo, kukhiqizwa insimu yamagnetic ezungeze intambo. Lokhu kungachazwa kusetshenziswa umthetho we-Biot-Savart othi insimu yamagnetic \(\mathbf{B}\) endaweni ethile esikhaleni ebangelwa yisici samanje \(I\) kuntambo ingabalwa ngesibalo esilandelayo:
\[ d\mathbf{B} = \frac{\mu_0 I}{4\pi} \frac{d\mathbf{s} \izikhathi \mathbf{\hat{r}}}{r^2} \]
Kuphi:
– \(\mu_0\) ukuvuleka kwe-vacuum,
– \(d\mathbf{s}\) yisici sobude bentambo,
– \(\mathbf{\hat{r}}\) iyi-vector yeyunithi ekhomba kusukela ku-element yamanje kuya endaweni lapho insimu ibalwe khona,
– \(r\) ibanga eliphakathi kwento yamanje kanye nephuzu.
Lesi sibalo sibonisa ukuthi insimu yamagnetic ekhiqizwa yintambo ethwala ugesi ayixhomekile nje kuphela kugesi kodwa futhi nasebangeni kanye nokuma okuhlobene nesici esithwala ugesi. Insimu yamagnetic ephumelayo iyindilinga eqondile ezungeze intambo, futhi isiqondiso sayo singanqunywa kusetshenziswa umthetho wesandla sokunene.
Amandla Kamagnetic Entanjeni Ethwala Amandla
Amandla kazibuthe asebenza entanjeni ethwala ugesi ensimini yamagnetic yangaphandle angachazwa ngumthetho ka-Ampère othi amandla \(\mathbf{F}\) engxenyeni yentambo enobude \(dl\) ethwele ugesi \(I\) ensimini yamagnetic \(\mathbf{B}\) anikezwa ngu:
\[ d\mathbf{F} = I (d\mathbf{l} \izikhathi \mathbf{B}) \]
Lo mthetho ukhombisa ukuthi amandla entambo awaxhomekile nje kuphela kumandla kagesi kanye nobude bento yentambo, kodwa futhi nasekuqondeni kwento yentambo maqondana nensimu yamagnetic. Uma insimu yamagnetic kanye nesiqondiso samandla kagesi entambo kwakha i-engeli ethile, amandla avelayo azoba sendleleni eqondile kuzo zombili izivektha.
Ukuhlanganisa la mandla kulo lonke ubude bentambo kunikeza amandla aphelele asebenza kuntambo ensimini yamagnetic. Ezinye izinhlelo zokusebenza ezibonisa lo mqondo zifaka phakathi ama-motor kagesi, ama-generator, nama-solenoid.
Umthetho ka-Ampère kanye neLorentz Force
U-Ampère wathuthukisa umthetho ongenhla waba umthetho ojwayelekile owaziwa ngokuthi uMthetho ka-Ampère ngesimo esihlanganisiwe othi umugqa ohlanganisiwe wensimu yamagnetic \(\mathbf{B}\) endleleni evaliwe \(\mathbf{C}\) ulingana nomthamo ophelele ogeleza kulowo mphezulu:
\[ \oint_{\mathbf{C}} \mathbf{B} \cdot d\mathbf{l} = \mu_0 I_{\text{enc}} \]
Cishe ngesikhathi esifanayo nalokhu kwakhiwa, uLorentz wanikela ngomthetho ochaza amandla asebenza ekushajweni okuhambayo ensimini kagesi \(\mathbf{E}\) kanye nensimu yamagnetic \(\mathbf{B}\). Amandla kaLorentz okushaja \(q\) ahamba ngesivinini \(\mathbf{v}\) yilawa:
\[ \mathbf{F} = q(\mathbf{E} + \mathbf{v} \izikhathi \mathbf{B}) \]
Uma kwenzeka ucingo oluthwala ugesi, ijubane \(\mathbf{v}\) lamashaji entambo libangelwa ugesi, ngakho-ke la mandla kaLorentz empeleni anegalelo emandleni kazibuthe esiwabona esebenza entanjeni.
Izicelo Eziwusizo
Imoto kagesi
Enye yezindlela ezaziwa kakhulu zokusebenzisa amandla kazibuthe ezintanjeni ezithwala amandla kagesi yimoto kagesi. Ama-motor kagesi asebenza ngesimiso sokuthi intambo ethwala amandla kagesi ensimini kazibuthe ibhekane namandla abangela ukunyakaza. Isibonelo, kumoto elula ye-DC, kusetshenziswa i-commutator ukuqinisekisa ukuthi amandla kagesi ageleza ezingxenyeni zentambo ezitholakala ensimini kazibuthe, ngaleyo ndlela igcine i-rotor ijikeleza.
Ijeneretha Kagesi
Cishe okuphambene nemoto kagesi, ijeneretha kagesi isebenzisa ukunyakaza komshini ukukhiqiza ugesi ocingweni olubekwe ensimini yamagnetic. Ngamanye amazwi, lapho ucingo lujikeleza ensimini yamagnetic, insimu yamagnetic eshintshayo ngalo ibangela ukuba kufakwe i-voltage ocingweni ngokomthetho kaFaraday wokungeniswa kwe-electromagnetic.
Ama-Solenoid nama-Electromagnet
I-solenoid iyithuluzi elakhiwe yi-coil yocingo ekhiqiza insimu yamagnetic lapho kudluliswa ugesi kuyo. Ama-solenoid avame ukusetshenziswa njenge-actuator ezinhlotsheni ezahlukene zemishini neze-elekthronikhi. Insimu yamagnetic ekhiqizwa yi-solenoid ingalawulwa ngokushintsha inani lamandla kagesi ageleza ngentambo.
I-Penutup
Amandla kazibuthe entanjeni ethwala ugesi angumqondo oyisisekelo ku-electromagnetism onezinhlelo eziningi zobuchwepheshe besimanje. Kusukela kuma-motor kagesi kuya kuma-generator nama-solenoid, amadivayisi amaningi nemishini yethu yansuku zonke incike kulesi simiso. Ukuqonda okujulile ngemithetho esekela la mandla kazibuthe akugcini nje ngokwandisa ukuqonda kwethu ukuthi indawo yonke isebenza kanjani kodwa futhi kuvula namathuba okusungula izinto ezintsha kwezobuchwepheshe esikhathini esizayo.
Lokhu kuqonda amandla kazibuthe kuye kwashintsha kusukela ekuhlolweni okulula kuya ekusetshenzisweni okuyinkimbinkimbi kwezobuchwepheshe besimanje, okubonisa ukubaluleka kwalokhu okutholiwe ekuthuthukisweni kwesayensi nobunjiniyela. Njengoba siqhubeka nokuhlola ngokujulile, singalindela ukuthola izindlela ezintsha kakhulu zokusebenzisa la mandla ukuze kuthuthukiswe isintu.
