Answer to Question #116929 in Electric Circuits for James

Question

Explain, using diagrams, how Fleming’s Left Hand Rule (FLH) applies to electric motors and how Fleming’s Right Hand Rule (FRH) applies to AC generators

Answer 1

Fleming’s Left Hand Rule (FLH) in electric motors allows us finding the direction of the force, or direction of rotation of a DC motor:

A wire with an electric current (red) is subjected to a magnetic field (green) perpendicular to the wire. This interaction causes force (purple) that moves the wire. Since there are many wires fixed on an anchor (or rotor, rotating part of the motor), the anchor moves and the motor is working:

Application of Fleming’s Right Hand Rule (FRH) in AC generators:

FRH helps to find the direction of the current in the wire that moves relative to the field.

Images for FLH and FRH were taken from Wikipedia.org