Magnetostatics

Magnetostatics is the study of magnetic fields in systems where the currents are steady (not changing with time). It's similar to electrostatics where electric charges are at rest. In magnetostatics, instead of charges, we deal with magnetic poles. Just like static electric fields are created by charges that are not moving, static magnetic fields come from steady currents, like a constant flow of electricity in a wire. Understanding magnetostatics helps us in designing electronic devices, like those used in power generation and communications.