Incazelo yamandla kagesi
Amandla afundwa emsebenzini kanye namandla anqunywa njengomsebenzi owenziwa ngesikhathi esithile. Umsebenzi inqubo yokushintsha kwamandla ukuze amandla aqondwe njengoshintsho lwamandla olwenzeka ngesikhathi esithile.
Amandla kagesi ushintsho lwamandla kagesi phakathi nesikhathi esithile. Ekubuyekezweni kwamandla kagesi, kuchazwa ukuthi izinguquko zamandla kagesi ezenzeka lapho ishaja kagesi idlula umehluko wamandla kagesi.
Isibalo samandla kagesi
Ngokwezibalo, ushintsho kumandla kagesi (ΔEP) luhambisana nokushaja (Q) kanye ne-voltage kagesi (V), evezwa yi-equation ΔEP = Q V.
Amandla ushintsho emandleni kagesi angasebenza esikhathini esithile, oluvezwa ngokwezibalo nge-equation 1:
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 ngesikhathi esithile zenzeka lapho ugesi udlula umehluko othile wamandla kagesi. Amandla kagesi alingana namandla kagesi kanye namandla kagesi, ngakho-ke uma ugesi kanye namandla kagesi kukhuphuka, amandla kagesi nawo ayakhula.
Uma ugesi ugeleza nge-resistor enokumelana kagesi okungaguquki, amandla kagesi angabalwa kusetshenziswa i-equation 3 noma i-equation 4.
Iyunithi yamandla kagesi
Ngokusekelwe ku-equation 1, iyunithi yamandla yeSistimu Yomhlaba Wonke yiJoule kanti iyunithi yesikhathi yeSistimu Yomhlaba Wonke ingeyesibili ukuze iyunithi yamandla kagesi ibe yiJoule/yesibili, okufingqiwe 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, efushanisiwe nge-VA.
