This rule is used in the context of electric motors and magnetic fields. According to this rule, if you position your left hand as follows:
1. Thumb: Represents the direction of motion (thrust).
2. First Finger: Represents the direction of the magnetic field (from north to south).
3. Second Finger: Represents the direction of the electric current (from positive to negative).
This rule helps to determine the direction of motion of the motor based on the direction of the electric current and the magnetic field.
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