Gather data: Click Reverse to move the magnet down to the bottom. The wire loop should be directly above the magnet, as low as you can drag it.
A. How many magnetic field lines are currently going through the loop?
There are currently zero magnetic field lines going through the loop as the magnet is below the wire loop.
Click Forward and wait until the magnet gets to the top. How many field lines are
passing through the loop now?