Simple electromagnet

Electromagnetism was improved upon by André-Marie Ampère, who showed that current flowing through a wire bent into a helix could strengthen the magnetic effect, with the helix acting like a magnet with a north pole and a south pole.
 André-Marie Ampère France 1820 Simple electromagnet

Electromagnetism was improved upon by André-Marie Ampère, who showed that current flowing through a wire bent into a helix could strengthen the magnetic effect, with the helix acting like a magnet with a north pole and a south pole.