Ukuqonda Amandla oMbane
Amandla, njengoko kufundwe kwicandelo lomsebenzi namandla , achazwa njengomsebenzi owenziwe kwixesha elithile. Umsebenzi yinkqubo yokuguqulwa kwamandla, ngoko ke amandla anokuqondwa njengotshintsho kumandla kwixesha elithile.
Amandla ombane kukutshintsha kwamandla ombane kwixesha elithile. Ingxoxo malunga namandla ombane ichaza ukuba utshintsho kumandla ombane luyenzeka xa itshaja yombane idlula kumahluko wamandla ombane.
URumus
Ngokwezibalo, utshintsho kumandla ombane (ΔEP) luhambelana netshaja (Q) kunye nevolthi yombane (V), ebonakaliswa nge-equation ΔEP = Q V. Amandla lutshintsho kumandla ombane kwixesha elithile, ebonakaliswa nge- equation 1 ngokwezibalo :
Itshaja yombane ehamba ngexesha elithile yi -electric current , echazwa ngokwezibalo nge-equation I = Q/t. I-equation 1 ingatshintshwa ibe yi -equation 2 :
Ngokusekelwe kwezi zibalo zimbini, kunokugqitywa kwelokuba utshintsho kumandla ombane kwixesha elithile lwenzeka xa umsinga wombane udlula kumahluko othile wamandla ombane. Amandla ahambelana namandla omsinga wombane kunye namandla ombane. Ke ngoko, ukuba umsinga wombane kunye/okanye amandla ombane ayanda, amandla nawo ayanda.
Ukuba umbane udlula kwi-resistor, amandla abalwa kusetyenziswa i-equation 3 okanye i-equation 4.
Icandelo
Ngokusekelwe kwi -equation 1 , iyunithi yamandla yeNkqubo yeHlabathi yiJoule kwaye iyunithi yexesha yeNkqubo yeHlabathi yeyesibini, ngoko ke iyunithi yamandla yiJoule/yesibini, efinyezwa njenge-J/s. IJoule/yesibini ikwabizwa ngokuba yiWatt. 1 Watt = 1 Joule/yesibini.
Ngokusekelwe kwi -equation 2 , iyunithi yamandla ombane yiVolt kwaye iyunithi yamandla ombane yiAmpere ngoko ke iyunithi yamandla ombane yiVolt Ampere, efinyezwa njenge-VA.
