Ucango lomlilo lokufunxa ucango lwe-electromagnetic lucango lwe-electromagnetic lokufunxa olusetyenziswa kwiingcango ezizenzekelayo. Inomsebenzi wokugcina umnyango womlilo ngokuqhelekileyo uvulekile kwaye uvale ngokuzenzekelayo kwimeko yomlilo. Kukho iintlobo ezininzi zeengcango zokutsalwa kweengcango, iintlobo ezahlukeneyo zokutsalwa kweengcango zifakwe ngeendlela ezahlukeneyo, kunye neentlobo ezisebenzayo zeminyango yomlilo nazo zihluke.