Cov hluav taws xob qis feem ntau yog ua los ntawm cov yeeb yaj kiab carbon encapsulated hauv cov vaj tsev yas, thaum lub zog hluav taws xob muaj zog feem ntau yog cov kab hluav taws xob uas ua los ntawm kev qhwv cov xaim hluav taws xob siab nyob ib ncig ntawm cov porcelain core.
Yog hais tias tus nqi ntawm cov resistor nyob ze rau xoom ohms (xws li, ib tug loj cross-section hlau ntawm ob lub ntsiab lus), ces tus resistor tsis muaj impediment cuam tshuam rau tam sim no, thiab lub Circuit Court ntawm resistor txuas nyob rau hauv parallel yog luv thiab lub tam sim no yog infinite. Yog hais tias ib tug resistor muaj ib tug infinite los yog loj heev kuj, lub Circuit Court txuas nyob rau hauv series mus rau lub resistor yuav xam tau tias yog ib tug qhib Circuit Court nrog xoom tam sim no. Ib qho resistor feem ntau siv hauv kev lag luam yog qhov chaw nruab nrab ntawm ob qhov siab, nws muaj qee qhov kev tiv thaiv thiab tuaj yeem dhau ib qho tam sim no, tab sis tam sim no tsis loj npaum li qhov luv luv Circuit Court. Qhov kev txwv tam sim no ntawm ib qho resistor zoo ib yam li cov raj me me uas txuas nrog ntawm ob txoj kab uas hla loj uas txwv cov dej ntws. Resistance, feem ntau abbreviated li R, yog ib yam khoom ntawm conductors, uas muaj feem xyuam rau qhov loj, khoom, thiab kub ntawm tus neeg xyuas pib. Ohm txoj cai lij choj hais tias kuv=U / R, ces R=U / I, lub hauv paus ntawm kev tawm tsam yog ohms, uas yog sawv cev los ntawm Greek tsab ntawv "Ω", thiab muaj cov ntsiab lus no: thaum Lub volt voltage yog ntxiv rau tus neeg xyuas pib, qhov kev tiv thaiv sib haum rau tam sim no ntawm ib qho amperer yog generated. Lub luag haujlwm tseem ceeb ntawm tus resistor yog los thaiv qhov ntws ntawm tam sim no. Qhov tseeb, "tsis kam" yog hais txog ib qho khoom, thiab qhov kev tawm tsam feem ntau raug xa mus rau hauv cov khoom siv hluav taws xob yog hais txog tus resistor ua ib feem. Ohms feem ntau abbreviated li ohms. Lwm cov chav nyob uas feem ntau siv los qhia qhov tsis kam yog kiloohms (kΩ), megaohms (MΩ), thiab milliohms (m Ω).
