- Fleming's right hand rule
Fleming's right hand rule (for
generators) shows the direction of induced currentflow when a conductor moves in a magnetic field.
The right hand is held with the
thumb, first fingerand second fingermutually at right angles, as shown in the diagram .
* The Thumb represents the direction of Motion of the conductor.
* The First finger represents the direction of the Field.
* The Second finger represents the direction of the induced or generated Current (in the classical direction, from positive to negative).
*One particular way of remembering the rule is the "FBI" acronym for Force(or otherwise motion), B as the magnetic field sign and I as the current. The subsequent letters corespond to subsequent fingers, counting from the top. Thumb -> F; First finger -> B; Second finger -> I
There is also a
Fleming's left hand rule(for electric motors). The appropriately-handed rule can be recalled from the letter "g", which is in "right" and "generator".
mnemonics are named after British engineer John Ambrose Fleming, who invented them.
Fleming's left hand rulefor motors
Right hand grip rule
* [http://micro.magnet.fsu.edu/electromag/electricity/generators/index.html Diagrams at magnet.fsu.edu]
* [http://www.broadeducation.com/htmlDemos/AbsorbPhysics/CurrentMagnets/page.htm Diagram and interactive exercises]
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