Magnetic field is a region around the magnet where the magnetic force is experienced. Magnetic field is represented by lines called magnetic field lines which also show direction of the magnetic field.
Direction of magnetic force is the direction to which a north pole of a magnet would move when set to freely move.
Understanding Magnetic Fields
Magnetic field lines must not cross each other but always flows parallel to each other. They repel each other and forms closed paths.
At the middle of a bar magnet, which is the midpoint of the separation of the two poles of a magnet, there exists no magnet field as there is no magnetic field lines passing there. Such a point is usually referred to as the neutral line.
A neutral point in a magnetic field is the point where the magnetism due to like poles cancels each other.
The poles of a magnetic have the highest concentration of the magnetic field lines hence the strongest magnetic force.
The stronger the magnet, the closer the field lines.
If the magnetic field lines are parallel and equally spaced , then the magnetic field is said to be uniform.
The direction of magnetic field lines is such a way that they run from north towards the south outside of the magnet and from south to north inside the magnet as shown.
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