Who identified the link between electricity and magnetism?

The connection between electricity and magnetism was discovered by Hans Christian Ørsted in 1820.

During an experiment, Ørsted observed that when an electric current flowed through a wire, a nearby compass needle deflected. This showed that an electric current produces a magnetic field around the conductor.

This discovery was significant because it established the fundamental relationship between electricity and magnetism, leading to the development of concepts like electromagnetism, which are essential in modern electrical devices.