Physics is a really interesting subject, especially to the ones who always look for logic behind stuff, well experiments make physics more interesting to anyone.I guess every one of you already know lenz’s law, but if you don’t here it is

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.