Lub zog ntawm DC electromagnet's magnetism muaj feem xyuam rau ntau yam. Nws muaj kev sib raug zoo nrog qhov loj ntawm tam sim no thiab tus naj npawb ntawm cov lem hauv lub kauj, thiab tseem cuam tshuam los ntawm seb nws puas muaj cov tub ntxhais hlau. Hauv lwm lo lus, thaum tam sim no los ntawm electromagnet zoo ib yam, qhov ntau tig lub kauj muaj, qhov muaj zog ntawm cov hlau nplaum. Thaum tus naj npawb ntawm cov lem yog tib yam, qhov loj dua tam sim no, qhov muaj zog ntawm cov hlau nplaum.
DC electromagnet yog ib qho khoom siv hluav taws xob. Thaum muaj zog, nws pom cov hlau nplaum, thiab thaum de-energized, cov hlau nplaum no ploj mus. Lub zog ntawm lub tshuab hluav taws xob hlau nplaum tuaj yeem tswj tau los ntawm lub zog ntawm qhov tam sim no lossis tus naj npawb ntawm cov lem hauv lub kauj. Nws tseem tuaj yeem tswj tau los ntawm kev kho qhov kev tiv thaiv kom tswj tau qhov ntsuas tam sim no. Yog li ntawd, lub zog ntawm cov hlau nplaum feem ntau cuam tshuam los ntawm qhov tam sim no qhov loj, tus naj npawb ntawm cov lem hauv lub kauj, thiab qhov muaj lossis tsis muaj cov tub ntxhais hlau. Electromagnets muaj kev siv dav heev hauv lub neej txhua hnub. Lawv qhov kev tsim kho tau zoo heev txhim kho lub zog ntawm cov tshuab hluav taws xob, daws ntau yam teeb meem hauv tib neeg lub neej, yog li muab kev pabcuam tseem ceeb.