AC & DC Machinery: Induction Motors
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Questions and Answers

What is the phenomenon responsible for inducing an electromotive force across the electrical conductor in an induction motor?

  • Electromagnetic conduction
  • Electromagnetic induction (correct)
  • Electromagnetic resistance
  • Electromagnetic rotation

    • What is the difference between synchronous speed and rotor speed called in an induction motor?

  • Speed deviation
  • Synchronous deviation
  • Slip (correct)
  • Rotor lag

    • Why are induction motors referred to as 'asynchronous motors'?

  • They operate at a speed less than synchronous speed (correct)
  • They operate at a speed equal to synchronous speed
  • They do not operate based on electromagnetic induction
  • They operate at a speed greater than synchronous speed

    • What is the principle on which the induction motor operates?

    <p>Electromagnetic induction</p> Signup and view all the answers

    What are the two types of rotors found in an induction motor?

    <p>Cage rotor and wound rotor</p> Signup and view all the answers

    What is the rotor induced EMF in an induction motor a result of?

    <p>The interaction between the rotating magnetic field and the rotor conductors</p> Signup and view all the answers

    What is the reason for the induction motor being referred to as an asynchronous motor?

    <p>The rotor always runs at a speed less than the synchronous speed</p> Signup and view all the answers

    What determines the frequency of both the rotor EMF and rotor current in an induction motor?

    <p>The rate at which the rotor conductors cut the flux</p> Signup and view all the answers

    Why does the rotor in an induction motor always run at a speed less than the synchronous speed?

    <p>Due to the lagging of flux current in the rotor with flux current in the stator</p> Signup and view all the answers

    What is slip in an induction motor?

    <p>The difference between synchronous speed and rotor speed</p> Signup and view all the answers

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