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If the frequency of 3-phase supply to the stator of a 3-phase induction motor is increased, then synchronous speed………….
  • a)
    is decreased
  • b)
    is increased
  • c)
    remains unchanged
  • d)
    none of the above
Correct answer is option 'B'. Can you explain this answer?
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Will also increase. This means that the rotor will also rotate at a higher speed, but not at the same rate as the synchronous speed. The actual speed of the rotor is determined by the difference between the synchronous speed and the rotor slip. Therefore, if the frequency of the 3-phase supply is increased, the rotor slip will decrease and the rotor speed will increase, but not as much as the synchronous speed.
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If the frequency of 3-phase supply to the stator of a 3-phase induction motor is increased, then synchronous speed………….a)is decreasedb)is increasedc)remains unchangedd)none of the aboveCorrect answer is option 'B'. Can you explain this answer?
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