17_1?Currents?and?Moving?Charges?as?Sources? of?Magnetic?Fields Mar/28/2016 M.?Burkardt?? NMSU?? PHYS?214?? Spring?2016 1 Phys214 Electricity & Magnetism Sources of Magnetic Fields: Moving Charges and Currents Electromagnetism (Big Picture Summary) Electric charges can be separated, transferred. There are two kinds of charges. There are forces between charges. Magnets exert a force on moving electric charges. Moving electric charges (currents) or changing electric fields produce magnetic fields.El. charge can induce polarization in a nearby object. (Static effect) An oscillating charge creates a wave, that travels through space and carries energy, which oscillates between electric and magnetic fields: Electromagnetic waves