A permanent magnet generates a magnetic field without any external power supply. No current through a coil, no energy input required to maintain the field. The magnetism is a property of the material itself, and it persists indefinitely under normal operating conditions. That simplicity is deceptive. The difference between the magnet on your refrigerator and…
Iron Ore
What a Permanent Magnet Actually Is and Why It Needs Rare Earths
A permanent magnet generates a magnetic field without any external power supply. No current through a coil, no energy input required to maintain the field. The…
