Here we can simulate the results of some of the experiments that Michael Farday made to discover the induction law.
You can drag the red wire loop with your mouse. This loop is coupled to the galvanometer in the background with electrical leads. However, these cables only obstruct the view, and we therefore have only drawn the yellow and green end points of the two cables. Transparent cables! Another triumph of the virtual world!
Move the loop into or out of the magnet, and the galvanometer will indicate a current. How much will depend on the velocity with which you move the loop.
You can also reverse the polarity of the magnet by simply clicking on the gray front areas of the horse shoe. How does this change the motion of the galvanometer needle when you move the loop into and out of the magnet?
© W. Bauer, 1999