Observe: The number of lines is proportional to the magnetic flux (ΦM) 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.

Question

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?

Answer 1

As the magnet rises from the bottom, the magnetic flux through the loop increases. This is because the magnetic field lines are becoming more concentrated within the loop as the magnet moves closer to it. This increase in magnetic flux induces an electric current in the loop.