Please enable JavaScript.
Coggle requires JavaScript to display documents.
Electromagnetism Timeline (600 B.C.E (221–206 BCE (1600's (1752 (1789,…
Electromagnetism Timeline
600 B.C.E
Earliest writings about electromagnetism: Mathematician and scientist Thales of Miletus described his experiments rubbing animal fur on various substances such as amber. Thales discovered that amber rubbed with fur attracts bits of dust and hairs that create static electricity, and if he rubbed the amber for long enough, he could even get an electric spark to jump.
221–206 BCE
The magnetic compass was invented in China
1600's
English scientist William Gilbert undertook a number of careful electrical experiments, in the course of which he discovered that many substances were capable of manifesting electrical properties. He also discovered that a heated body lost its electricity and that moisture prevented the electrification of all bodies.
1752
Benjamin Franklin discovered there are two kinds of charges, positive and negative: objects with like charges repel one another, and those with unlike charges attract one another.
1789
Italian professor Luigi Galvani discovered that electricity from two different metals causes frog legs to twitch. To account for this phenomenon, Galvani assumed that electricity of opposite kinds existed in the nerves and muscles of the frog.
1790
Alessandro Volta invented the first electric battery. With the pile battery, Volta proved that electricity could be generated chemically and debunked the prevalent theory that electricity was generated solely by living beings.
1820
Hans Christian Oersted discovered what would become known as Oersted's Law: that an electric current affects a compass needle and creates magnetic fields.
1821
Andre Marie Ampere annonce his theory of electrodynamics: two parallel portions of a circuit attract one another if the currents in them are flowing in the same direction, and repel one another if the currents flow in the opposite direction. Two portions of circuits crossing one another obliquely attract one another if both the currents flow either towards or from the point of crossing and repel one another if one flows to and the other from that point. When an element of a circuit exerts a force on another element of a circuit, that force always tends to urge the second one in a direction at right angles to its own direction.
1831
2 more items...
Reference:
Bellis, M. (2020, February 11). A Timeline of Events in Electromagnetism.
ThoughtCo
.
https://www.thoughtco.com/electromagnetism-timeline-1992475