Choletsa ndi gawo lamagetsi lopanda mphamvu kuti lipange kukana mu kayendedwe ka magetsi. Pafupifupi ma network onse amagetsi ndi ma electronic circuits amapezeka. Kukana kumayesedwa mu ohms. Ohm ndi kukana komwe kumachitika pamene mphamvu ya ampere imodzi imadutsa mu resistor ndi kutsika kwa volt imodzi kudutsa ma terminal ake. Mphamvu yamagetsi imafanana ndi mphamvu yamagetsi kudutsa ma terminal. Chiŵerengero ichi chikuyimiridwa ndiLamulo la Ohm:

Ma resistors amagwiritsidwa ntchito pazinthu zambiri. Zitsanzo zingapo zikuphatikizapo malire a magetsi, kugawa magetsi, kupanga kutentha, ma match machine ndi loading circuits, control gain, ndi fix time constants. Amapezeka m'masitolo okhala ndi resistance values ​​​​zoposa ma orders asanu ndi anayi. Angagwiritsidwe ntchito ngati mabuleki amagetsi kuti achotse mphamvu ya kinetic kuchokera ku sitima, kapena kukhala ocheperapo kuposa milimita imodzi ya sikweya ya zamagetsi.

Ma Values ​​a Resistor (Ma Values ​​Okondedwa)
Mu zaka za m'ma 1950, kuchuluka kwa ma resistors kunapangitsa kuti pakhale kufunika kwa ma resistor ofanana. Mitundu ya ma resistance values ​​imafanana ndi ma resistor otchedwa ma preferred values. Ma resistor values ​​amafotokozedwa mu E-series. Mu E-series, mtengo uliwonse ndi wapamwamba kuposa wakale. Ma E-series osiyanasiyana alipo pa ma tolerances osiyanasiyana.

Mapulogalamu oletsa
Pali kusiyana kwakukulu m'magawo a ntchito za resistors; kuyambira zigawo zolondola mu zamagetsi a digito, mpaka zida zoyezera kuchuluka kwa thupi. Mu chaputala chino ntchito zingapo zodziwika zalembedwa.

Zotsutsa motsatizana komanso mofanana
Mu ma circuit amagetsi, ma resistors nthawi zambiri amalumikizidwa motsatizana kapena motsatizana. Mwachitsanzo, wopanga ma circuit angaphatikize ma resistors angapo okhala ndi ma standard values ​​(E-series) kuti afike pa resistance values ​​enieni. Pa kulumikizana kwa ma series, mphamvu yamagetsi kudzera mu resistor iliyonse ndi yofanana ndipo resistance yofanana ndi yofanana ndi kuchuluka kwa ma resistors payekhapayekha. Pa kulumikizana kofanana, voltage kudzera mu resistor iliyonse ndi yofanana, ndipo inverse ya resistance yofanana ndi yofanana ndi kuchuluka kwa ma inverse values ​​onse otsatizana. Mu ma resistors a nkhani mu parallel ndi series, kufotokozera mwatsatanetsatane kwa zitsanzo zowerengera kumaperekedwa. Kuti athetse ma network ovuta kwambiri, malamulo a circuit a Kirchhoff angagwiritsidwe ntchito.

Yesani mphamvu yamagetsi (choletsa shunt)
Mphamvu yamagetsi imatha kuwerengedwa poyesa kutsika kwa magetsi pamwamba pa chotsutsa cholondola chomwe chili ndi kukana kodziwika, komwe kumalumikizidwa motsatizana ndi dera. Mphamvu yamagetsi imawerengedwa pogwiritsa ntchito lamulo la Ohm. Ichi chimatchedwa ammeter kapena shunt resistor. Nthawi zambiri iyi ndi chotsutsa cha manganin cholondola kwambiri chomwe chili ndi kukana kotsika.

Zotsutsa za ma LED
Magetsi a LED amafunika mphamvu inayake kuti agwire ntchito. Mphamvu yotsika kwambiri sidzayatsa LED, pomwe mphamvu yokwera kwambiri ingayatse chipangizocho. Chifukwa chake, nthawi zambiri amalumikizidwa motsatizana ndi ma resistors. Izi zimatchedwa ballast resistors ndipo zimawongolera mphamvu yamagetsi mu dera.

Choletsa injini ya blower
Mu magalimoto, njira yopumira mpweya imayendetsedwa ndi fan yomwe imayendetsedwa ndi blower motor. Resistor yapadera imagwiritsidwa ntchito kuwongolera liwiro la fan. Izi zimatchedwa blower motor resistor. Mapangidwe osiyanasiyana amagwiritsidwa ntchito. Kapangidwe kamodzi ndi mndandanda wa ma resistor osiyanasiyana a waya pa liwiro lililonse la fan. Kapangidwe kena kali ndi dera lolumikizidwa mokwanira pa bolodi losindikizidwa la circuit.