Resistance vs Resistor
Thaum twg muaj qhov cuam tshuam qhov kev xav tau ntawm txhua yam peb hais muaj kev tawm tsam rau qhov kev txiav txim ntawd. Peb ntsib qhov teeb meem no hauv hluav taws xob circuits ib yam nkaus. Thaum ib qho hluav taws xob tam sim no dhau los ntawm cov khoom siv, nws ua rau muaj kev cuam tshuam rau qhov ntws ntawm qhov tam sim no. Qhov no tsuas yog lub npe hu ua hluav taws xob tsis kam thiab qhov loj ntawm qhov tsis kam mus rau qhov ntws ntawm tam sim no txawv ntawm cov khoom mus rau cov khoom siv.
Resistance yog dab tsi?
Nyob rau hauv physics thiab hluav taws xob engineering, kev tiv thaiv yog txhais raws li qhov piv ntawm qhov sib txawv ntawm qhov sib txawv ntawm cov terminals ntawm ib lub caij mus rau cov hluav taws xob tam sim no dhau los ntawm nws. Nws yog ib qho kev ntsuas ntawm cov ntsiab lus tawm tsam kom dhau ntawm cov nqi hluav taws xob. Cov lus txhais saum toj no yog lej qhia raws li R=V / I, qhov twg R yog qhov tsis kam, V qhov txawv txav, thiab kuv qhov hluav taws xob tam sim no. Lub inverse ntawm qhov tsis kam yog txhais raws li qhov conductance ntawm cov khoom.
Resistance feem ntau yog nyob ntawm ob yam; lub geometry ntawm lub caij thiab cov khoom. Txij li cov hluav taws xob tam sim no yog qhov txuas ntxiv ntawm cov hluav taws xob los ntawm cov khoom siv qhov dav (inch) ntawm tus neeg xyuas pib cuam tshuam rau qhov tsis kam, ib yam li txoj kab uas hla ntawm cov yeeb nkab txiav txim siab qhov siab tshaj plaws ntws.
Lwm qhov tseem ceeb yog cov khoom siv, tshwj xeeb yog kev teeb tsa hluav taws xob thiab kev sib txuas ntawm cov molecules lossis ions tam sim no hauv cov khoom. Thaum muaj peev xwm sib txawv yog siv rau qhov kawg ntawm ib lub caij nws ua zoo li qhov sib txawv ntawm qhov sib txawv ntawm qhov kawg ntawm cov yeeb nkab. Cov electrons zoo siab heev rau qib siab zog ntau dua hu ua conduction band thiab cov electrons tau xoob khi rau lub nuclei ntawm cov atoms los ntawm electromagnetic rog uas ua rau muaj kev txav mus los ntau dua rau cov electrons. Yog hais tias cov ntaub ntawv yog hlau, lub sab nraud electrons twb nyob rau hauv conduction band nyob rau hauv chav tsev kub, li no yuav ua tau zoo conductors muaj tsawg kuj. Cov ntaub ntawv nrog covalent bonding tam sim no nyob rau hauv cov qauv, xws li ntoo, iav thiab plastics muaj electrons nruj nreem khi rau lub nuclei thiab lub zog yuav tsum tau los tsa cov electrons mus rau lub conduction band yog ntau ntau dua li cov hlau thiab qhia tau hais tias muaj kev tiv thaiv siab. Cov cuab yeej ntawm kev tsis kam muab los ntawm cov khoom siv yog suav tias yog qhov resistivity ntawm cov khoom. Txij li thaum lub zog ntawm electrons nyob ntawm qhov kub thiab txias, qhov kev tiv thaiv kuj nyob ntawm qhov kub thiab txias.
Cov cuab yeej no kuj yog siv los ua cov ntaub ntawv categorizing. Cov ntaub ntawv uas tsis tshua muaj resistivity yog hu ua conductors, thiab cov ntaub ntawv nrog nruab nrab resistivity yog hu ua semi-conductors thiab cov ntaub ntawv uas muaj siab resistivity li cov insulators.
Resistor yog dab tsi?
Ib yam khoom tseem ceeb uas muaj los ntawm qhov tsis kam ntawm lub caij ruaj khov yog tias, ntawm qhov sib txawv tsis tu ncua, qhov tsis tu ncua tam sim no los ntawm lub caij. Yog li ntawd, tam sim no los ntawm ib lub voj voog tuaj yeem tswj tau siv cov resistors, thiab thaum qhov tam sim no tsis tu ncua qhov sib txawv ntawm cov terminals yog qhov tas li. Yog li, resistors yog cov khoom siv ntawm txhua qhov hluav taws xob hluav taws xob. Resistors yog tsim los ntawm cov khoom sib txawv nrog rau qhov sib txawv rau ntau daim ntawv thov.
Qhov txawv ntawm Resistance thiab Resistor yog dab tsi?
• Kev tiv thaiv yog ib yam khoom ntawm cov khoom los tawm tsam qhov ntws ntawm hluav taws xob tam sim no.
• Lub resistor yog ib qho hluav taws xob tiv thaiv hluav taws xob nrog tus nqi ruaj khov uas siv los tswj tam sim no los ntawm lub caij lossis qhov sib txawv ntawm lub caij.
