- Fleming's left hand rule
The left hand is held with the
thumb, index fingerand middle fingermutually at right angles. It can be recalled by remembering that "motors drive on the left, in Britain anyway."
* The First finger represents the direction of the Field.
* The Second finger represents the direction of the Current (in the classical direction, from
* The Thumb represents the direction of the Thrust or resultant Motion.
There also exists
Fleming's right hand rule(for generators). The appropriately-handed rule can be recalled by remembering that the letter "g" is in "right" and "generator".
mnemonicsare named after British engineer John Ambrose Flemingwho invented them.
Other mnemonics also exist that use a
left hand ruleor a right hand rulefor predicting resulting motion from a pre-existing current and field.
De Graaf's translation of Fleming's left-hand rule - which also uses thrust, field and current - and the right-hand rule, is the FBI rule. The FBI rule changes Thrust into F (Lorentz force), B (direction of the magnetic field) and I (current). The FBI rule is easily remembered by US citizens because of the commonly known abbreviation for the
Federal Bureau of Investigation.
A right-handed variant of this rule is as follows:If the current through a wire is in the direction of the thumb of the right hand, and the direction of an external magnetic field on the wire is represented by the fingers, then the force experienced by the wire will be in the direction the palm of the right hand is facing.
Fleming's right hand rulefor generators
Right hand rule
* [http://www.ac.wwu.edu/~vawter/PhysicsNet/Topics/MagneticField/RightHandRule.html Overview at ac.wwu.edu (Right Hand - 'FIB')]
* [http://micro.magnet.fsu.edu/electromag/electricity/generators/index.html Diagrams at magnet.fsu.edu. See figure #9. (Left Hand - 'FBI')]
* [http://www.starprof.com/ac/physpring04/phy030804pp/sld014.htm Description at starprof.com (Right Hand - 'IBF' - palm alternative)]
* [http://www.gcse.com/energy/motor.htm Memorable mnemonics at gcse.com]
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Fleming's right hand rule — (for generators) shows the direction of induced current flow when a conductor moves in a magnetic field.The right hand is held with the thumb, first finger and second finger mutually at right angles, as shown in the diagram .* The Thumb… … Wikipedia
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Fleming’s rule — kairės rankos taisyklė statusas T sritis fizika atitikmenys: angl. Fleming’s rule; left hand rule vok. Linke Hand Regel, f rus. правило левой руки, n; правило Флеминга, n pranc. règle de la main gauche, f … Fizikos terminų žodynas
John Ambrose Fleming — Infobox Scientist name = Sir J. Ambrose Fleming caption = birth name = John Ambrose Fleming birth date = birth date|1849|11|29|mf=y birth place = Lancaster, Lancashire, England death date = death date and age|1945|4|18|1849|11|29|mf=y death place … Wikipedia
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