Lub hauv paus ntsiab lus ntawm peb-theem kev rho tawm transformer pib txais lub hauv paus ntsiab lus ntawm electromagnetic induction. Nws muaj kev nyab xeeb rau kev siv peb-theem kev rho tawm transformer, uas feem ntau yog siv los kho lub zog. Kev rho tawm transformer feem ntau yog 1: 1 transformer, tab sis nws muaj qhov sib txawv. Peb-theem kev rho tawm transformers yog siv rau kev hloov voltage, teeb pom kev zoo, fais fab mov thiab rectifying fais fab mov, dav siv rau kev lag luam thiab mining lag luam, fais fab nroj tsuag, tshav dav hlau, high-sawv vaj tse, subways thiab lwm qhov chaw uas muaj kev nyab xeeb hluav taws kub.