Thaum ob lub conductors sib txawv los yog semiconductors, A thiab B, tsim ib lub voj voog nrog lawv qhov xaus kev cob cog rua, lub electromotive force (EMF) yog generated nyob rau hauv lub circuits ntev li ntev raws li qhov kub ntawm ob junctions txawv. Ib kawg, ntawm qhov kub thiab txias T, yog hu ua qhov kawg ua hauj lwm los yog kub hlws ris, thiab lwm yam kawg, ntawm kub T0, yog hu ua dawb kawg (tseem hu ua qhov kawg siv) los yog txias hlws ris. Kev taw qhia thiab qhov loj ntawm EMF no nyob ntawm cov khoom siv ntawm cov khoom siv hluav taws xob thiab qhov kub thiab txias ntawm ob qhov sib txuas.
Qhov tshwm sim no hu ua "thermoelectric effect," lub Circuit Court tsim los ntawm ob lub conductors hu ua "thermocouple," ob lub conductors hu ua "thermoelectric elements," thiab EMF generated hu ua "thermoelectric EMF."
Lub thermoelectric EMF muaj ob ntu: ib qho yog qhov sib txuas ntawm qhov sib txawv ntawm ob tus neeg xyuas, thiab lwm qhov yog qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm ib tus neeg xyuas pib.
Qhov loj ntawm cov thermoelectric EMF nyob rau hauv ib lub thermocouple Circuit Court tsuas yog nyob ntawm cov ntaub ntawv ntawm cov conductors tsim lub thermocouple thiab qhov kub thiab txias ntawm ob junctions, thiab yog ywj siab ntawm cov duab thiab loj ntawm lub thermocouple. Thaum cov ntaub ntawv ntawm ob lub electrodes ntawm lub thermocouple yog tsau, lub thermoelectric EMF yog ib qho kev ua haujlwm ntawm qhov kub thiab txias sib txawv ntawm ob qhov sib txuas, t thiab t0.
