By Katie Leigh
Updated Mar 24, 2022
A magnet is a piece of material that can attract ferromagnetic objects such as iron, nickel, and cobalt. Every magnet has two distinct ends known as the north and south poles. When a magnet is suspended freely, the north pole points toward the Earth’s geographic north, while the south pole points toward the geographic south—hence the names.
Interestingly, if you cut a bar magnet in half, each piece still retains both a north and a south pole. This occurs because magnetic dipoles are distributed throughout the material rather than confined to a single point.
Opposite poles attract while like poles repel. When a north pole approaches a south pole, the magnetic field lines flow smoothly between them, allowing the forces to combine and pull the two magnets together. Conversely, when two north poles (or two south poles) are brought close, the magnetic field lines clash, creating a repulsive force that pushes them apart.
Each pole generates a magnetic field that circulates between the north and south ends. Introducing an opposite pole into this field does not disrupt the field lines; the field simply continues. A like pole, however, would force the field lines to bend back on themselves, which is energetically unfavorable. As a result, the magnet resists the presence of a similar pole, producing the familiar push‑away effect.
