Oersted

Hans Christian Ørsted was a Danish physicist who, in 1820, discovered that electric currents create magnetic fields around them. This breakthrough showed a direct link between electricity and magnetism, revealing that an electric current flowing through a wire produces a magnetic field similar to that of a magnet. This discovery helped pave the way for the development of electrical technologies like motors, generators, and transformers. Essentially, Ørsted's work demonstrated that electricity and magnetism are interconnected natural phenomena, laying the foundation for the modern electromagnetic field theory.