Colin James Physics - Physics data.
Last updated: 11th October 2013.
Collision - elastic - one dimension - calculations and formulae.
Collision - elastic - two dimensions - example with calculations.
Electromagnetism - Fleming's Rules.
Electromagnetism - Maxwell's Equations.
Physical constants - recommended values.
SI prefixes and units.
Electromagnetism - Fleming's Rules.
Contents of this page.
Fleming's left hand rule.
Fleming's right hand rule.
J A Fleming.
Fleming's left hand rule.
Fleming's left hand rule (also known as the Motor Rule) shows the direction of the force on a conductor carrying a current in a magnetic field.
The direction of the force (Thrust) on the conductor points in the direction of your thuMb/Thumb.
The magnetic Field (from North to South) points in the direction of your First finger (or Forefinger).
The Current flows (from positive to negative) in the direction of your seCond finger (Centre finger).
The capital letters in the thumb and fingers are meant to help you identify what they are pointing at, as follows:
M: conductor Moves in the direction of your thuMb.
T: the Thrust on the conductor is in the direction of your Thumb.
F: magnetic Field in the direction of your First finger (or Forefinger).
C: Current flows in the direction of your seCond finger (Centre finger).
Fleming's right hand rule.
Fleming's right hand rule shows the direction of a current induced in a conductor moving in a magnetic field.
The conductor Moves in the direction of your thuMb.
The magnetic Field (from North to South) points in the direction of your First finger (or Forefinger).
The Current flows (from positive to negative) in the direction of your seCond finger (Centre finger).
The capital letters in the thumb and fingers are meant to help you identify what they are pointing at, as follows:
M: conductor Moves in the direction of your thuMb.
F: magnetic Field in the direction of your First finger (or Forefinger).
C: Current flows in the direction of your seCond finger (Centre finger).
J A Fleming.
John Ambrose Fleming (29th November 1849 - 18th April 1945) was an electrical engineer and physicist.
He became Professor Sir J A Fleming MA DSc MRI.
Amongst other things he invented the vacuum tube (important in wireless transmission) in 1890 and in 1896
the first vacuum tube rectifier - the Fleming Valve patented in 1905.
Valves dominated the electronics industry until they were replaced by transistors in the 1970s. Transistors were subsequently replaced by silicon chips.
{Sources: http://www.sparkmuseum.com/book_fleming.htm, http://en.wikipedia.org/wiki/John_Ambrose_Fleming}.
End of page.