Kumvetsetsa Mphamvu Zamagetsi
Mmodzi zomwe zaphunziridwa m'nkhaniyi khama ndi mphamvu Ntchito imafotokozedwa ngati ntchito yochitidwa kwa nthawi inayake. Ntchito ndi njira yosinthira mphamvu, motero mphamvu imatha kumvedwa ngati kusintha kwa mphamvu kwa nthawi inayake.
Mphamvu yamagetsi ndi kusintha kwa mphamvu yamagetsi pakapita nthawi inayake. Mu ndemanga ya mphamvu yamagetsi anafotokoza kuti kusinthaku mphamvu zamagetsi zimachitika pamene mphamvu yamagetsi imadutsa mu kusiyana kwa mphamvu yamagetsi.
Fomula
Mwa masamu, kusintha kwa mphamvu yamagetsi (ΔEP) kumafanana ndi mphamvu (Q) ndi mphamvu yamagetsi (V), zomwe zimafotokozedwa kudzera mu equation ΔEP = Q V. Mphamvu ndi kusintha kwa mphamvu yamagetsi mkati mwa nthawi inayake, yomwe imafotokozedwa mwa masamu kudzera mu equation 1 :
Chaji yamagetsi yomwe imayenda mkati mwa nthawi inayake ndi magetsi, yofotokozedwa mwa masamu kudzera mu equation I = Q/t. Equation 1 ikhoza kusinthidwa kukhala equation 2 :
Kutengera ndi ma equation awiriwa, zitha kutsimikiziridwa kuti kusintha kwa mphamvu zamagetsi pakapita nthawi inayake kumachitika pamene mphamvu yamagetsi imadutsa mu kusiyana kwa mphamvu yamagetsi. Mphamvu imafanana ndi mphamvu yamagetsi ndipo mphamvu yamagetsi, chifukwa chake, ngati mphamvu yamagetsi ndi/kapena mphamvu yamagetsi ikuwonjezeka, mphamvuyo imawonjezekanso.
Ngati magetsi akuyenda kudzera mu resistor, mphamvu imawerengedwa pogwiritsa ntchito equation 3 kapena equation 4.
Chigawo
Kutengera equation 1, Dongosolo Lapadziko Lonse la mayunitsi a mphamvu ndi Joule ndipo Dongosolo Lapadziko Lonse la mayunitsi a nthawi ndi lachiwiri kotero gawo la mphamvu ndi Joule/lachiwiri, mwachidule J/s. Joule/lachiwiri limatchedwanso Watt. 1 Watt = 1 Joule/lachiwiri.
Kutengera equation 2, gawo la mphamvu yamagetsi ndi Volt ndipo gawo la mphamvu yamagetsi ndi Ampere kotero gawo la mphamvu yamagetsi ndi Volt Ampere, chidule chake ndi VA.
