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When electricity flows (with direction given by conventional current) in a long straight wire, it creates a cylindrical magnetic field around the wire according to the right-hand rule. The conventional direction of a magnetic line is given by a compass needle.
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What Is Fleming’s Right-Hand Rule? According to Faraday’s law of electromagnetic induction, when a conductor moves through a magnetic field, an electric current is induced in it. Fleming’s right-hand rule is used to determine the direction of the induced current.
How To Use the Right Hand Rule to Find the Direction of Magnetic Force. This Right Hand Rule relates magnetic force FB, magnetic field B and velocityv of a moving charge (equivalently, current, since current is just moving charge.) There are at least three ways to apply the Right Hand Rule.
Apply the right-hand rule to determine the direction of a magnetic force based on the motion of a charge in a magnetic field. Sketch magnetic field lines to understand which way the magnetic field points and how strong it is in a region of space.
Fleming devised the right hand rule (though Fleming's original version used the left hand) in order to make relationships between current, its magnetic field, and the electromotive force easier to visualize and understand.
The magnetic field lines form concentric circles around the wire. The direction of the magnetic field can be determined using the right-hand rule. This rule shows up in several places in the study of electricity and magnetism.