Ørsted's experiment

Ørsted's experiment demonstrated that electric currents create magnetic fields. He directed an electric current through a wire near a compass, and observed the compass needle deflecting from its usual position. This showed that electricity and magnetism are connected phenomena. His discovery was crucial because it revealed a fundamental relationship between electric currents and magnetic forces, laying the groundwork for electromagnetic technology. In essence, Ørsted proved that electricity can produce magnetism, which was a groundbreaking step toward understanding how electromagnetic devices like motors and transformers work.