Multimeter ntsuas peb-theem hluav taws xob tag nrho muaj qhov voltage yog qhov teeb meem li cas
Ntsuam xyuas cov theem uas tsis teeb nrog lub cwj mem hluav taws xob, los ntawm lub hwj huam mov kawg mus rau qhov chaw ntsuas qhov chaw, kev sib cuag tsis zoo ntawm qhov hloov los yog xaim txuas. Los yog cov hlau tsis txuas.
Thaum ob lub xov hlau sib tw ua ke, vim yog oxidation dhau lub sijhawm, ua rau cov txheej txheem tsis muaj hluav taws xob oxide nyob rau ntawm qhov chaw ntawm cov xov hlau, ua rau cov pob qij txha tsis muaj hluav taws xob, uas ua rau muaj qhov qhib hluav taws xob.
Kuj tseem muaj qhov yuam kev nyob rau hauv aluminium hlau thiab tooj liab hlau tso tseg ua ke, tooj liab thiab txhuas muaj peev xwm sib txawv, tooj liab thiab txhuas tiv tauj ib feem yuav nrawm dua vim yog oxidation ntawm txhuas hlau ntawm thawj lub roj teeb cov tshuaj tiv thaiv, cov tooj liab thiab txhuas cov pob qij txha yuav nyob rau hauv kev sib cuag tsis zoo tom qab lub sijhawm ntev.
Thaum cov pob qij txha tsim ib txheej oxide, tsis muaj conductive tom qab cov xov ntawm ob kawg ntawm cov hlau ua ntej lub hav zoov ntawm capacitance.
Cov xov hlau sib tw ua ke nrog ib leeg tuaj yeem kwv yees li ib qho tag nrho cov khoom tiaj tus muab tso ua ke los ntawm cov xov hlau nyias.
Peb tuaj yeem ua qhov kwv yees kwv yees raws li qhov peb tau kawm txog qhov sib npaug ntawm cov phaj capacitors hauv tsev kawm theem siab.
Parallel phaj capacitor formula:
C=εs/d
Parallel phaj capacitor yog qhov yooj yim tshaj plaws capacitor uas muaj txheej txheej ntawm cov khoom siv insulating, dielectric (cua yog ib qho dielectric), sandwiched ntawm ob daim hlau sib txuas uas nyob ze rau ib leeg.
s yog qhov chaw txheeb ze ntawm cov xov hlau ntawm ob qhov kawg. Yog hais tias lub vojvoog r ntawm cov xov hlau yog 5 hli thiab qhov ntev l ntawm qhov xaus qhwv ib ncig yog 10 cm.
Qhov txheeb ze thaj tsam s ntawm ob kawg ntawm cov hlau yog roughly, s {{{0}} × π × r × l=2 × 3.14 × 0.005 × 0.{{ 7.00314sq.
d yog lub thickness ntawm oxide txheej, xav tias yog 100 µm.
Hauv qhov chaw, ε=8.85 × 10-12F/m.
Yog li nws tuaj yeem kwv yees kom tau C=270pF.
