Lub npe hu ua roj teeb yog ib qho khoom siv hluav taws xob uas tuaj yeem khaws cov khoom siv hluav taws xob thiab tso hluav taws xob thaum xav tau. Qhov me me ntawm lub zog sab hauv ntawm txhua lub roj teeb yog, qhov muaj zog tawm ntawm qhov loj tam sim no, thiab lub zog hluav taws xob ntau dua yog dissipated. Tag nrho cov khoom siv hluav taws xob muaj qee qhov kev tiv thaiv sab hauv. Txhawm rau txhim kho lub peev xwm nqa tau, tau kawg, lub zog sab hauv ntawm cov khoom siv hluav taws xob yuav tsum tsawg li tsawg tau.
Resistance R yog qhov kev tiv thaiv sab hauv ntawm lub tsheb roj teeb, RL yog qhov kev sib txuas hauv cov koob nrog rau sab hauv tsis kam R ntawm lub roj teeb, thiab qhov tam sim no ntws mus rau R yog sib npaug rau cov load tam sim no. Piv txwv tias qhov loj ntawm R tseem tsis hloov pauv, nrog rau qhov nce ntawm cov khoom thauj tam sim no, qhov tam sim no ntws los ntawm kev tiv thaiv sab hauv R nce, thiab qhov hluav taws xob ntawm ob qhov kawg ntawm R nce, yog li qhov hluav taws xob siv rau ob qho kawg ntawm load RL txo. Yog tias qhov hluav taws xob poob siab dhau lawm, RL yuav tsis ncav cuag qhov ntsuas hluav taws xob ua haujlwm thiab yuav tsis ua haujlwm li qub. Yog li ntawd, lub zog sab hauv ntawm lub roj teeb yuav tsum yog me me li sai tau, yog li ntawd lub zog poob ntawm ob qho tag nrho ntawm kev tiv thaiv sab hauv yuav tsis loj thaum tsav tsheb dhau.
Lub zog sab hauv ntawm lub roj teeb yuav nce ntxiv nrog rau lub sijhawm dhau mus, tshwj xeeb tshaj yog cov kev tiv thaiv sab hauv ntawm lub roj teeb uas tab tom yuav muab pov tseg. Lub sijhawm no, lub roj teeb hluav taws xob siab tom qab tau them tag nrho, tab sis thaum lub roj teeb tau them tag nrho, qhov kev tiv thaiv sab hauv yuav nce ntxiv nrog kev nce ntawm kev tiv thaiv sab hauv. Siv lub tshuab hluav taws xob siab tam sim no, thiab qhov hluav taws xob poob yuav tshwm sim, txo qhov hluav taws xob ntawm ob qho kawg ntawm qhov load.
