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? type here B. Click Forward and wait until the magnet gets to the top. How many field lines are passing through the loop now? type here Observe: The number of lines is proportional to the magnetic flux (M) through the loop. Magnetic flux is a measure of how powerful the magnetic force is through a given area. An electric current can only be induced if the magnetic flux is changing through the loop. Click Reverse to move the magnet to the bottom. Turn on Show loop data and click Forward. How does the magnetic flux change as the magnet rises? type here Draw conclusions: In general, how do the current and electric field relate to the change in magnetic flux? type here Challenge: Michael Faraday (1791-1867), who is generally credited as the discoverer of electromagnetic induction (in 1831), discovered the relationship between voltage (V), the force that creates a current in a wire, and the magnetic flux. Faraday's law of magnetic induction relates voltage to the change in magnetic flux (M) and the time interval (t). Based on the observations you have made, what is Faraday's law? Check your answer with your teacher. V = type here Activity C: Moving the loop Get the Gizmo ready: Click Forward to move the magnet to the top. Turn off Show ma