Thaum peb tso lub dielectric ntawm ob daim hlau ntawm lub phaj sib luag, lub tshuab hluav taws xob polarises nws. Tus nqi deg densities yog σp thiab - σp Thaum peb tso lub dielectric tag nrho ntawm ob daim hlau ntawm lub capacitor, ces nws yog dielectric tas li nce. los ntawm nws lub tshuab nqus tsev nqi.
Thaum dielectric muab tso rau hauv capacitor lub capacitance nce?
Dielectrics hauv capacitors pab peb lub hom phiaj: kom cov hlau ua kom tsis txhob muaj kev sib cuag, tso cai rau cov phaj me me sib cais thiab yog li muaj peev xwm ntau dua; txhawm rau ua kom muaj peev xwm ua tau zoo los ntawm kev txo cov hluav taws xob lub zog, uas txhais tau tias koj tau txais tib yam nqi ntawm qhov qis dua; thiab.
Yuav ua li cas rau qhov capacitance thaum cov khoom siv dielectric ntxig rau ntawm daim hlau ntawm cov phaj sib npaug?
Thaum lub dielectric slab tau ntxig rau ntawm daim phiaj ntawm lub capacitor, uas tau txuas nrog lub roj teeb, piv txwv li tus nqi ntawm nws nce, ces tus capacitance (C) nce, muaj peev xwm sib txawv (V) nruab nrab ntawm daim hlau tseem tsis hloov pauv thiab lub zog khaws cia hauv lub capacitor nce
Kev sib txheeb ntawm capacitor thiab dielectric yog dab tsi?
A capacitor yog ib qho khoom siv hluav taws xob uas khaws cov nqi hluav taws xob, qhov a dielectric yog cov khoom siv uas tsis tso cai rau tam sim no. Dielectrics feem ntau hu ua insulators raws li lawv yog cov opposite ntawm conductors.
Puas yog cov khoom siv dielectric ntawm daim hlau puas cuam tshuam rau lub peev xwm ntawm lub capacitor?
Lub peev xwm ntawm cov txheej txheem ntawm cov hlau sib txuas yog nce los ntawm kev ntxig ntawm cov khoom siv dielectric. Lub capacitance yog inversely proportional rau hluav taws xob teb ntawm daim hlau, thiab lub xub ntiag ntawm dielectric txo cov hluav taws xob zoo.
