Hand Rule

Shyanne Walton



  • When an electric current flows in a wire, and an external magnetic field is applied across that flow,
the wire experiences a force perpendicular both to that field and to the direction of the current flow.
  • Now that may be a little hard to remember after a semester full of intersting and mind blowing concepts
from Phyiscs 30, fortunatly you weren't the only one who needed help with this.And so was born the left hand rule.
  • A left hand can be held, as shown in the illustration, to help as a visual device to remember the vectors.
  • Van de Graaff's translation of Flemings original left hand rule (intended for generators and motors).
The only altercation is that the motion, represented by the thumb in Flemings model, was changed to the force.
Also known as the FBI rule. Where F(Force), B(Magnetic Field), and I (Current)
external image 220px-LeftHandOutline.pngexternal image 300px-ManoLaplace.svg.png

(Flemings) (Van de Graaff's)



Also known as the FBI rule. Where F(Force), B(Magnetic Field), and I (Current)



  1. http://en.wikipedia.org/wiki/Fleming's_left-hand_rule_for_motors
  2. http://en.wikipedia.org/wiki/File:LeftHandOutline.png
  3. http://en.wikipedia.org/wiki/File:ManoLaplace.svg