The current direction is shown two different ways; one is by the arrow in the meter which is attached to the coil. What happens to the emf (shown in the graph and in the box below) when the north pole...The current direction is shown two different ways; one is by the arrow in the meter which is attached to the coil. What happens to the emf (shown in the graph and in the box below) when the north pole of the magnet moves into the coil? What happens to the emf when the north end of the magnet moves away (to the right) from the coil? The read head consists of a small coil of wire that is located very close to the disk and can be moved around to reach different parts of the disk.
