Isku-dhafka is-dhex-galka wadaagga ahi waa erey ka yimid qaybta fiisigiska iyo injineernimada korantada, waxaana loola jeedaa cabbirka heerka isbeddelka hadda ku socda hal wareeg ama gariiradda siligga uu keeno danab wareeg kale oo u dhow. ama gariiradda. Gaar ahaan, waxaa lagu qeexaa sida saamiga awoodda korantada ee la kiciyay (EMF) ee wareegga labaad ilaa heerka isbeddelka hadda ee wareegga aasaasiga ah, waxaana sida caadiga ah lagu muujiyaa cutubyada henries per ampere (H / A). Si kale haddii loo dhigo, waxay qiyaasaysaa awoodda laba wareeg oo ay ku kala beddelan karaan tamarta iyada oo loo marayo goobaha elektromagnetic.