Fleming’s Right-Hand Rule
Fleming’s right-hand rule gives the direction of induced current when a conductor moves in a magnetic field: thumb = motion, forefinger = field, middle finger = induced current.
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Generator rule
When a straight conductor moves in a magnetic field and cuts magnetic field lines, an emf is induced and current may flow if the circuit is closed. Fleming’s right-hand rule helps remember the direction: stretch your right hand so that the thumb, forefinger, and middle finger are mutually perpendicular. Thumb points in the direction of motion of the conductor, forefinger in the direction of magnetic field (north to south), and middle finger gives the direction of induced current.
Link to induction
The rule is consistent with the idea that induced current opposes the change causing it (Lenz’s law). It is particularly useful in understanding generators where mechanical motion in a magnetic field produces electrical energy.
How is Fleming’s right-hand rule related to electromagnetic induction in a generator?