1890 – England
Fleming’s right-hand and left-hand rules are used for the relationship between the directions of current flow, motion and magnetic field in electric motors and dynamos respectively
![photo of John Ambrose Fleming ©](https://geoffneilsen.files.wordpress.com/2013/03/john_ambrose_fleming600x400.jpg?w=300&h=200)
The rules are named after the inventor of the thermionic valve who devised them.
![ambrosefleming372x600 diagram of the thermionic valve invented by Ambrose Fleming](https://geoffneilsen.files.wordpress.com/2012/06/ambrosefleming372x600.jpg?w=186&h=300)
![JOHN AMROSE FLEMING Wikipedia-logo © (link to wikipedia)](https://historyofscience101.wordpress.com/wp-content/uploads/2013/03/wikipedia_logo35x35.png?w=620)
TIMELINE
current, electricity, electromagnetism, England, HISTORY OF SCIENCE, left-hand rule, magnetic field, NINETEENTH CENTURY, PHYSICS, right-hand rule, science, UK, valve
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