Faraday Induction with Magnet & Coil

PIRA 5K10.20

Connect a coil to a galvanometer.  Move a bar magnet rapidly in and out of the coil to illustrate induced current from Faraday induction.  The large Sargent Welch Lecture Galvanometer shown at right works well for large classes. 

With the magnet still, the coil can be moved over the magnet to illustrate current from the Lorentz force.  This serves as a good introductory demo for relativity.  Only relative motion between the magnet and the coil is important, and the fields that are perceived depend on the reference frame.