Rau cov neeg siv hluav taws xob, cov hluav taws xob dawb yuav muaj nyob ntawm. Valence band. Nruab nrab ntawm valence thiab conduction band.
Yuav ua li cas pub dawb electrons nyob rau hauv ib tug conductor?
Cov kev taw qhia ntawm cov pa tam sim no yog los ntawm lub davhlau ya nyob twg zoo, dhau ntawm tus neeg xyuas pib, mus rau lub davhlau ya nyob twg tsis zoo. Cov kev taw qhia ntawm dawb electron ntws yog los ntawm qhov tsis zoo davhlau ya nyob twg, los ntawm tus neeg xyuas pib, mus rau qhov zoo terminal.
Puas conductors muaj dawb electrons?
Cov khoom siv hluav taws xob tau yooj yim heev vim lawv cov hluav taws xob dawb. Insulators tiv thaiv hluav taws xob tam sim no thiab ua rau cov neeg ua haujlwm tsis zoo. Qee cov neeg siv khoom siv yog tooj liab, txhuas, kub, thiab nyiaj.
Vim li cas cov conductors muaj dawb electrons?
Qhov resistivity ntawm tus neeg xyuas pib tsawg heev. Yog vim li cas rau qhov zoo heev conduction thiab tsawg heev resistivity ntawm ib tug conductor yog tias nws muaj dawb txav electrons. Txij li thaum cov electrons tsis muaj kev sib raug zoo rau cov nucleus zoo, lawv tuaj yeem txav mus los.
Puas muaj pes tsawg electrons dawb nyob hauv ib tus neeg xyuas pib?
Nco ntsoov tias tus neeg xyuas pib zoo muaj 1 valence electrons thiab ib qho insulator muaj yim valence electrons. Lub semiconductor muaj 4 valence electrons. Nws tsis yog ib tug zoo conductor los yog ib tug zoo insulator. Thaum tus naj npawb ntawm cov protons nyob rau hauv ib lub atom sib npaug ntawm cov electrons lub atom tau hais tias yog nruab nrab.
