Today it is 200 years ago, that H. C. Ørsted discovered electromagnetism. Without knowing it, he formed the basis for the widespread use of electricity in our daily life, that we live today.
Electromagnetism is used for motors, radio, radar, mobile phones, computers and speakers.
Hans Christian Ørsted 1777 – 1851, was a Danish physicist and chemist who discovered that electric currents create magnetic fields, which was the first connection found between electricity and magnetism: https://en.wikipedia.org/wiki/Hans_Christian_%C3%98rsted