I-resistor iyingxenye kagesi engenzi lutho ukudala ukumelana nokugeleza kwamandla kagesi. Cishe kuwo wonke amanethiwekhi kagesi namasekhethi kagesi angatholakala. Ukumelana kukalwa ngama-ohms. I-ohm ukumelana okwenzeka lapho i-current ye-ampere eyodwa idlula ku-resistor enokwehla kwe-volt eyodwa kumatheminali ayo. I-current ilingana ne-voltage emaphethelweni etheminali. Lesi silinganiso simelwe nguUmthetho ka-Ohm:

Ama-resistors asetshenziselwa izinhloso eziningi. Izibonelo ezimbalwa zifaka i-delimit electric current, i-voltage division, ukukhiqiza ukushisa, amasekhethi afanayo nokulayisha, ukuzuza kokulawula, kanye nokulungisa izikhathi ezingaguquki. Atholakala ngokwentengiso ngamavelu okumelana nohlu lwama-oda angaphezu kwesishiyagalolunye obukhulu. Angasetshenziswa njengamabhuleki kagesi ukuze alahle amandla e-kinetic ezitimeleni, noma abe mancane kunemilimitha yesikwele yezinto zikagesi.

Amanani Aphikisayo (Amanani Akhethwayo)
Ngawo-1950 ukukhiqizwa okwandisiwe kwama-resistor kwadala isidingo samanani okumelana ajwayelekile. Ububanzi bamanani okumelana bulinganiswa ngalokho okubizwa ngamavelu athandwayo. Amanani akhethwayo achazwa ku-E-series. Ochungechungeni lwe-E, lonke inani lingamaphesenti athile aphezulu kunangaphambili. Uchungechunge lwe-E oluhlukahlukene lukhona lokubekezelelana okuhlukile.

Izicelo zokuphikisa
Kukhona umehluko omkhulu emikhakheni yezicelo zama-resistors; kusukela ezingxenyeni ezinembayo ku-electronics wedijithali, kuze kube kumadivayisi wokulinganisa amanani aphathekayo. Kulesi sahluko kubalwe izicelo eziningi ezidumile.

Ama-resistors ochungechungeni nangokuhambisana
Kumasekhethi e-elekthronikhi, ama-resistors avame ukuxhunywa ochungechungeni noma ngokuhambisana. Umklami wesekethe angase ngokwesibonelo ahlanganise izinto eziphikisayo ezimbalwa ezinamavelu ajwayelekile (E-series) ukuze afinyelele inani elithile lokumelana. Ngokuxhunywa kochungechunge, okwamanje nge-resistor ngayinye kuyefana futhi ukumelana okulinganayo kulingana nesamba se-resistor ngayinye. Ngoxhumo oluhambisanayo, i-voltage ngokusebenzisa i-resistor ngayinye iyafana, futhi ukuhlanekezela kokumelana okufanayo kuyalingana nesamba samanani aphambene wawo wonke ama-resistor parallel. Kuma-athikili ama-resistors ngokuhambisana nochungechunge kunikezwa incazelo enemininingwane yezibonelo zokubala. Ukuxazulula amanethiwekhi ayinkimbinkimbi nakakhulu, imithetho yesekethe ye-Kirchhoff ingasetshenziswa.

Linganisa ugesi (i-shunt resistor)
Amandla kagesi angabalwa ngokulinganisa ukwehla kwamandla kagesi phezu kwe-resistor enembile enokumelana okwaziwayo, okuxhunywe ochungechungeni nesekhethi. I-current ibalwa ngokusebenzisa umthetho we-Ohm. Lokhu kubizwa ngokuthi i-ammeter noma i-shunt resistor. Ngokuvamile lesi simelaphi se-mangan esinembayo esiphezulu esinenani eliphansi lokumelana.

Ama-resistors ama-LED
Izibani ze-LED zidinga umsinga othize ukuze zisebenze. Umsinga ophansi kakhulu ngeke ukhanyise i-LED, kanti amandla amanje aphezulu kakhulu angashisa idivayisi. Ngakho-ke, zivame ukuxhunyaniswa ochungechungeni olunama-resistors. Lezi zibizwa ngokuthi i-ballast resistors futhi zilawula ngokuqhubekayo okwamanje kumjikelezo.

I-Blower motor resistor
Ezimotweni i-air ventilation system iculwa yi-fan eshayelwa yi-blower motor. I-resistor ekhethekile isetshenziselwa ukulawula isivinini sabalandeli. Lokhu kubizwa ngokuthi i-blower motor resistor. Kusetshenziswa imiklamo ehlukene. Idizayini eyodwa iwuchungechunge lwamasayizi ahlukene we-wirewound resistors ngesivinini somlandeli ngamunye. Omunye umklamo uhlanganisa isifunda esihlanganiswe ngokugcwele ebhodini lesifunda eliphrintiwe.