Zoo zoo, txawm li cas los xij, Faraday pom tias thaum lub dielectric muab tso rau ntawm daim hlau ntawm cov phaj sib npaug, lub capacitance nce los ntawm qhov zoo. Nws hu ua qhov tseem ceeb no "dielectric tas li." Nrog nws, peb tuaj yeem sau: ! thiab Ewith dielectric=Ew/0 dielectric " qhov twg ntau dua los yog sib npaug rau 1.
Leej twg nrhiav tau dielectric tas li?
Peter Debye Nobel tus neeg muaj txiaj ntsig nrhiav pom dielectric tas li.
Dab tsi yog qhov dielectric?
Dielectric tas li (ϵr) txhais tau tias yog qhov piv ntawm cov hluav taws xob permeability ntawm cov khoom mus rau hluav taws xob permeability ntawm qhov chaw dawb(piv txwv li, nqus tsev) thiab nws cov nqi tuaj yeem muab tau los ntawm tus qauv yooj yim capacitor.
Yuav ua li cas yog qhov dielectric tas li muab tau?
Yog C yog tus nqi ntawm lub capacitance ntawm lub capacitor uas muaj ib tug muab dielectric thiab C0 yog tus capacitance ntawm ib tug zoo tib yam capacitor nyob rau hauv lub nqus tsev vacuum, lub dielectric tas li, cim los ntawm tsab ntawv Greek kappa, κ, tsuas yog qhia raws li κ=C/C 0.
Lub hom phiaj ntawm qhov dielectric qhov tsis tu ncua yog dab tsi?
Lub dielectric tas li ntawm cov khoom txiav txim siab npaum li cas ntawm lub zog uas lub capacitor tuaj yeem khaws tau thaum siv hluav taws xob. Cov khoom siv dielectric dhau los ua polarized thaum nws raug rau qhov hluav taws xob. Thaum polarization tshwm sim, qhov hluav taws xob zoo txo qis.
