Ma'anar wutar lantarki
Ana ƙayyade ikon da aka koya a cikin aikin da kuma Makamashi a matsayin aikin da aka yi a cikin wani takamaiman lokaci. Aiki tsari ne na canza makamashi don a iya fahimtar iko a matsayin canji a cikin makamashi wanda ke faruwa a cikin wani takamaiman lokaci.
Wutar lantarki canji ne a cikin makamashin lantarki a cikin wani takamaiman lokaci. A cikin bita kan ƙarfin lantarki, an bayyana cewa canje-canje a cikin ƙarfin lantarki yana faruwa ne lokacin da cajin lantarki ya ratsa ta cikin bambancin ƙarfin lantarki.
Daidaito na wutar lantarki
A lissafi, canjin makamashin wutar lantarki (ΔEP) yana daidai da cajin (Q) da ƙarfin wutar lantarki (V), wanda aka bayyana ta hanyar lissafin ΔEP = Q V.
Ƙarfi canji ne a cikin ƙarfin wutar lantarki a cikin wani lokaci, wanda aka bayyana ta hanyar lissafi ta hanyar lissafi 1:
Cajin wutar lantarki da ke gudana a cikin wani takamaiman lokaci wutar lantarki ce, wadda aka bayyana ta hanyar lissafi ta hanyar lissafin I = Q/t. Ana iya canza daidaiton 1 zuwa lissafi na 2:
Dangane da waɗannan daidaito guda biyu, za a iya kammala da cewa canje-canje a cikin makamashin lantarki a cikin wani lokaci yana faruwa ne lokacin da wutar lantarki ta ratsa wani bambancin ƙarfin lantarki. Ƙarfin wutar lantarki yana daidai da ƙarfin wutar lantarki da ƙarfin wutar lantarki, don haka idan wutar lantarki da ƙarfin wutar lantarki suka ƙaru, wutar lantarki ma tana ƙaruwa.
Idan wutar lantarki tana gudana ta cikin resistor wanda ke da juriyar lantarki akai-akai, ana iya ƙididdige wutar lantarki ta amfani da lissafi na 3 ko lissafi na 4.
Naúrar wutar lantarki
Dangane da lissafi na 1, sashin Tsarin Makamashi na Duniya shine Joule kuma sashin lokaci na Tsarin Duniya shine na biyu don haka sashin wutar lantarki shine Joule/daki, wanda aka taƙaita shi J/s. Joule/daki kuma ana kiransa Watt. Watt 1 = Joule 1/daki.
Dangane da lissafi na 2, naúrar ƙarfin lantarki ita ce Volt kuma naúrar ƙarfin lantarki ita ce Ampere don haka naúrar ƙarfin lantarki ita ce Volt Ampere, wanda aka taƙaita shi a takaice VA.
