Tag Archives: electromagnets

Hans Christan Orsted’s discovery that electricity generates a magnetic field led to the development of electromagnets.  Electromagnets are bundles of wires wrapped around a ferrous core.  When electricity flows through the core, the iron magnetizes.  When the electric flow ceases, so does the strength of the magnet.  Electromagnets are integral parts of trash-lifters, alarms, cars,Continue reading “This Week In the Classroom: How to Build Electromagnets!”