Right-Hand Rule


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right-hand rule

[′rīt ¦hand ′rül]
(electromagnetism)
For a current-carrying wire, the rule that if the fingers of the right hand are placed around the wire so that the thumb points in the direction of current flow, the fingers will be pointing in the direction of the magnetic field produced by the wire. Also known as hand rule.
For a moving wire in a magnetic field, such as the wire on the armature of a generator, if the thumb, first, and second fingers of the right hand are extended at right angles to one another, with the first finger representing the direction of magnetic lines of force and the second finger representing the direction of current flow induced by the wire's motion, the thumb will be pointing in the direction of motion of the wire. Also known as Fleming's rule.

Right-Hand Rule

 

a mnemonic rule for determining the direction of the current induced in a conductor moving through a magnetic field. According to this rule, if the right palm is held in such a way that the extended thumb coincides with the direction of motion of the conductor and the lines of force of the magnetic field are entering the palm, then the direction of the current induced in the conductor coincides with the direction of the extended fingers. The right-hand rule follows from Lenz’s law.