Ukuqonda Amandla Kagesi
Amandla, njengoba kufundwe esigabeni somsebenzi namandla, achazwa njengomsebenzi owenziwe esikhathini esithile. Umsebenzi inqubo yokuguqulwa kwamandla, ngakho amandla angaqondwa njengoshintsho lwamandla esikhathini esithile.
Amandla kagesi ushintsho lwamandla kagesi phakathi nesikhathi esithile. Ingxoxo mayelana namandla kagesi ichaza ukuthi izinguquko zamandla kagesi ezenzeka lapho ishaja kagesi idlula umehluko wamandla kagesi.
Ifomula
Ngokwezibalo, ushintsho kumandla kagesi (ΔEP) luhambisana nokushaja (Q) kanye ne-voltage kagesi (V), evezwa nge-equation ΔEP = Q V. Amandla ushintsho kumandla kagesi esikhathini esithile, evezwa nge- equation 1 ngokwezibalo :
Ishaja kagesi egeleza phakathi nesikhathi esithile ingugesi kagesi , ovezwa ngokwezibalo nge-equation I = Q/t. I-Equation 1 ingashintshwa ibe yi -equation 2 :
Ngokusekelwe kulezi zibalo ezimbili, kungaphethwa ngokuthi izinguquko emandleni kagesi esikhathini esithile zenzeka lapho ugesi udlula umehluko othile wamandla kagesi. Amandla alingana namandla kagesi kanye namandla kagesi. Ngakho-ke, uma ugesi kagesi kanye/noma amandla kagesi enyuka, amandla nawo ayakhula.
Uma ugesi ugeleza nge-resistor, amandla abalwa kusetshenziswa i-equation 3 noma i-equation 4.
Iyunithi
Ngokusekelwe ku -equation 1 , iyunithi yamandla yeSistimu Yomhlaba Wonke yiJoule kanti iyunithi yesikhathi yeSistimu Yomhlaba Wonke ingeyesibili, ngakho iyunithi yamandla yiJoule/yesibili, efingqiwe ngokuthi J/s. IJoule/yesibili ibizwa nangokuthi iWatt. 1 Watt = 1 Joule/yesibili.
Ngokusekelwe ku -equation 2 , iyunithi yamandla kagesi yi-Volt kanti iyunithi yamandla kagesi yi-Ampere ngakho iyunithi yamandla kagesi yi-Volt Ampere, efushaniswe ngokuthi i-VA.
