Who Discovered Electromagnetism?
The Danish scientist Hans Christian Oersted discovered electromagnetism in 1820. He noticed that an electrical current flowing through a wire creates, or induces, magnetic forces in the surrounding area. He knew this, because the current caused a nearby compass needle to move. Oersted showed that electricity could create magnetism. Proving that electricity can cause magnetism was a great scientific discovery. If you sent enough current through a coil of wire wrapped around a piece of iron, you could create a powerful magnet. With an electromagnet you could lift hundreds of pounds, even thousands.