A bar magnet that is placed close to metal objects creates an magnetic force that is induced and is in line with the bar magnet’s magnetic field lines. When these induced field lines of the bar magnet are viewed from a specific direction, it is reminiscent of the shape of a needle pointed north. Magnets always have a north magnetic fields line, whereas the magnetic field of a bar magnet’s lines will be pointing to the south magnetic field. There are magnetic fields that go beyond either the south or north. These other fields can cause other magnetic field lines to exhibit different directions, too.
For instance, electric fields are normally parallel to small compasses, whereas larger compasses have opposite electric fields. Thus, the smaller compass would point North while the larger compass is South. The magnetic field lines that surround the poles can be affected by Earth’s form and movement. So, smaller compasses may point towards West while larger ones point towards East. Be aware that electric fields along smaller compass lines are closer to the North Pole than those along large compass lines.
Another difference between the magnetic field lines of a bar magnetic field or a small compass’s magnetic field is how much current flows through them. A small compass typically has one direction (North and South). A larger compass is likely to have two polarities (North and South, West and East). The flux of current is what makes the magnetic field lines of a bar magnet distinct from a small compass.
A compass can clearly show the difference in magnetic fields. A compass may show a North/South magnetic line with West/East magnet forces as the main forces that drive it to spin. Bar magnets will not show this same magnetic field line as there aren’t any huge magnetic fields in the North and South. Instead, there are just opposing West/East magnetic forces.
An easy explanation is that the West / East electrical force does not want to stay close to the North pole for extended periods of time. This causes the field of electricity to eventually retreat and produce an eroding magnetic field line. Also, since there are not large magnetic fields that are North/South in a bar magnet, it does not experience much magnetic field lines of the kind that a bar magnet experiences. Because of the lack of magnetic field lines that run horizontally in bar magnets the magnet is believed to be a magnet with “zero-induced magnetic field lines.” That means the magnet will always appear “centered” or in North magnetic direction.
However, in reality the magnetic field lines that are a part of bar magnets aren’t always accurate. For instance, if were to put your bare finger on the North pole, you would feel the sensation of a small compass because your magnetic field lines traced the finger back to the magnetic field. The magnetic field lines on the earth can also be very twisty, causing objects to be in different positions despite the fact that the North Pole is still at the center.https://www.youtube.com/embed/Y40zbCmsbm4