Electromagnetics is the branch of physics that studies the interactions between electric fields and magnetic fields. It explains how electric charges create electric fields, and how moving electric charges generate magnetic fields. This relationship is fundamental to understanding various technologies, such as electric motors and transformers. The principles of electromagnetics are described by Maxwell's equations, which unify electricity and magnetism into a single theory. These equations help predict how electromagnetic waves, like radio waves and light, propagate through space. Electromagnetics plays a crucial role in many modern applications, including telecommunications and medical imaging.