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Rotor rotate in which direction in a three-phase induction motor?
In the clockwise direction only
in the direction of RMF
In the anticlockwise direction only
Can't say. Depends on Load
in the direction of RMF
Quick Trick: Remember that the rotor in a three-phase induction motor always rotates in the direction of the rotating magnetic field (RMF) created by the stator.
Remember that the rotor in a three-phase induction motor always rotates in the direction of the rotating magnetic field (RMF) created by the stator.
Understand Rotating Magnetic Field (RMF)
In a three-phase induction motor, the stator generates a rotating magnetic field that determines the direction of the rotor's movement.
Relate Rotor Movement to RMF
The rotor always moves in the same direction as the RMF, which is a fundamental principle of induction motors.
Analyze Options
Based on the understanding of RMF, the only correct option is that the rotor moves in the direction of RMF.
A: Clockwise direction only is incorrect as the direction depends on the RMF; C: Anticlockwise direction only is wrong as it also depends on RMF; D: 'Can't say' is misleading since RMF defines the rotor direction.
B is correct because the rotor rotates in the direction of the rotating magnetic field created by the stator.
Similar questions may ask about the effects of changing phase sequences or loads on motor direction. Always relate back to the RMF principle.