Awesome Science: Lenz’s law in action
Lenz’s law is a common way of understanding electromagnetism, lenz’s law says an induced electromotive force always gives rise to a current whose magnetic field opposes the original change in magnetic flux.Here’s a demo of lenz’s law through eddy current tubes
Eddy Current Tubes — Drop the Magnets down the tube. An eddy current is set up in a conductor in response to a changing magnetic field. Lenz’s law predicts that the current moves in such a way as to create a magnetic field opposing the change; to do this in a conductor, electrons swirl in a plane perpendicular to the changing magnetic field.Because the magnetic fields of the eddy currents oppose the magnetic field of the falling magnet; there is attraction between the two fields. Energy is converted into heat. This principle is used in damping the oscillation of the lever arm of mechanical balances.