1. The problem statement I'm doing a stimulation. Here is a picture of it. http://desmond.imageshack.us/Himg267/scaled.php?server=267&filename=22904502.jpg&res=medium [Broken] The questions asks: when moving the voltage slider on the battery and dragging it all the way from right to left, what happens? - compass flips or stays the same. - magnetic field flips direction or stays the same. - current flows in the opposite direction or in the same direction. 3. The attempt at a solution I know that current stays the same and that the compass flips. Since the current stays the same, does that mean the magnetic field direction stays the same? When I move it, it seems like the magnetic field lines above and below the current in the wires flips, while the area inside the coil of wire stays the same.