Lenz's law states that when a magnetic field changes through a conductor, it induces an electric current that creates an opposing magnetic field. In the case of a hollow copper pipe, as the magnet falls through it, it creates a changing magnetic field within the pipe. According to Lenz's law, the induced electric current in the copper pipe will create a magnetic field that opposes the motion of the magnet. This opposing magnetic field generates a drag force on the magnet, counteracting its acceleration due to gravity. As a result, the magnet falls slower than expected due to the resistance offered by the opposing magnetic field created by the induced current in the copper pipe.
