Cov txheej txheem:
Video: Yuav ua li cas koj xam voltage poob feem pua?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Yuav kom xam voltage poob:
- Muab cov tam sim no hauv amperes los ntawm qhov ntev ntawm Circuit Court hauv ko taw kom tau ampere-feet. Qhov ntev ntawm Circuit Court yog qhov kev ncua deb ntawm lub hauv paus chiv keeb mus rau qhov kawg ntawm lub voj voog.
- Faib 100.
- Muab faib raws li tsim nyog hluav taws xob poob tus nqi hauv cov rooj. Qhov tshwm sim yog hluav taws xob poob .
Xav txog qhov no, dab tsi yog lub mis rau xam qhov voltage poob?
Voltage poob ntawm cov khoom siv hluav taws xob tuaj yeem txiav txim siab los ntawm kev sib npaug ntawm qhov tam sim no ntawm Circuit Court los ntawm tag nrho cov kev tiv thaiv ntawm cov khoom siv hluav taws xob: VD = I x R.
Qhov thib ob, qhov feem pua ntawm qhov poob qis yog qhov lees txais? 5%
Kuj Paub, koj yuav suav li cas voltage poob thiab cable loj?
Rau xam tus hluav taws xob poob rau ib lub voj voog raws li feem pua, muab cov tam sim no (amps) los ntawm qhov kab ntev (meters); ces faib tus lej no los ntawm tus nqi hauv lub rooj. Piv txwv li, 30m khiav ntawm 6mm2 kab nqa 3 theem 32A yuav ua rau 1.5% poob : 32A x 30m = 960Am / 615 = 1.5%.
Dab tsi yog qhov zoo voltage poob?
A zoo kev sib txuas yuav tsum muaj a hluav taws xob poob 0.2 volts los yog tsawg dua. Cov hluav taws xob poob ntawm qhov tsis zoo yuav tsum yog 0.3 volts lossis tsawg dua. Yog tias hluav taws xob poob siab dhau lawm, teem koj DVM mus rau 2 volt scale thiab pib tshawb xyuas txhua qhov kev sib txuas ntawm qhov tsis zoo kom pom qhov kev sib txuas tsis zoo lossis cable.
Pom zoo:
Yuav ua li cas koj xam qhov zaus ntawm zaus thiab feem pua?
Ua li no, faib cov zaus los ntawm tag nrho cov txiaj ntsig thiab muab faib los ntawm 100. Hauv qhov no, qhov zaus ntawm thawj kab yog 1 thiab tag nrho cov txiaj ntsig yog 10. Qhov feem pua yog tom qab ntawd yog 10.0. Cov kab kawg yog qhov feem pua Cumulative
Yuav ua li cas koj xam ua nyob rau hauv voltage?
Lub peev xwm built-in (ntawm 300 K) sib npaug fi = kT/q ln(1016 x 9 x 1017/ni2) = 0.77 V, siv kT/q = 25.84 mV thiab ni = 1010 cm-3. Lub peev xwm ua tau (ntawm 100 ° C) sib npaug fi = kT/q ln(1016 x 9 x 1017/ni2) = 0.673 V, siv kT/q = 32.14 mV thiab ni = 8.55 x 1011 cm-3 (los ntawm Piv txwv 20)
Yuav ua li cas koj sau ib feem raws li ib tug khoom ntawm ib tug tag nrho cov zauv thiab ib feem feem?
Cov cai los nrhiav cov khoom ntawm ib feem feem thiab tag nrho tus lej Peb xub sau tag nrho cov lej ua ib feem, piv txwv li, sau nws faib los ntawm ib qho; Piv txwv li: 7 yog sau ua 71. Peb mam li muab cov zauv. Peb muab cov denominators. Yog tias yuav tsum tau ua kom yooj yim, nws ua tiav thiab tom qab ntawd peb sau cov feem kawg
Yuav ua li cas koj xam feem pua purity?
% purity = g ntawm cov khoom ntshiab tau ÷ gof muab cov qauv × 100. Qhov feem pua purity ntawm ib yam khoom muaj peev xwm xam tau los ntawm kev faib qhov loj ntawm cov tshuaj ntshiab los ntawm tag nrho cov loj ntawm cov qauv, thiab tom qab ntawd muab cov lej no los ntawm 100
Yuav ua li cas koj xam lub sij hawm nws yuav siv ib yam khoom los poob?
Ntsuas qhov deb ntawm qhov khoom yuav poob hauv ko taw nrog tus pas ntsuas lossis ntsuas daim kab xev. Faib qhov kev ncua deb los ntawm 16. Piv txwv li, yog tias cov khoom yuav poob 128 ko taw, faib 128 los ntawm 16 kom tau 8. Xam cov square root ntawm cov kauj ruam 2 los nrhiav lub sij hawm nws yuav siv cov khoom poob hauv vib nas this