• Eddy currents are not just textbook curiosities; they are the hidden loops that appear whenever metal meets a changing magnetic field. • From DIY levitation tricks to clever braking systems, these swirling paths of electrons keep finding new ways to surprise and inspire. • In this rapid revisit, we will zoom in on the essentials, highlight a few practical pointers, and remind ourselves why this classic effect still merits a place in every innovator’s playbook. • Eddy currents: From losses to brakes to rice cookers Eddy currents are closed loops of electrical current induced in conductors by a changing magnetic field, as described by Faraday’s law of induction. • These currents circulate in planes perpendicular to the applied magnetic field. • By Lenz’s law, eddy currents generate their own magnetic field that opposes the change which created them.
Sources: