Northwestern Physics Demos                                 Go back to Magnetism
DCS# 5K20.11NWU# E-45 Location:   8 C 2
title: Eddie Current Pendululm
aka: Magnetic Brake

An aluminium plate pivots from a ring stand through a strong magnet.  Without the magnet, it swings several times before coming to rest.   With the magnet, it stop swinging in 2 or 3 cycles.
   Another plate has slits to interupt the eddie currents and swings as if the magnet were not there.

    Why do eddie currents reduce kinetic energy?
pix of set upset upset up