2-Phase Motors and Power
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Questions and Answers

What is the power rating of a three-phase motor when it is run from a single-phase power source?

  • Same as the 3-phase power rating
  • 2/3 of the 3-phase power rating (correct)
  • Double the 3-phase power rating
  • Half of the 3-phase power rating

    • Which type of motor can be run from a single-phase power source but will not self-start?

  • 3-phase motor (correct)
  • Induction motor
  • Single-phase motor
  • 2-phase motor

    • What type of magnetic field is produced by the single coil of a single-phase induction motor?

  • Pulsating magnetic field (correct)
  • Alternating magnetic field
  • Rotating magnetic field
  • Stationary magnetic field

    • In a single-phase induction motor, how many counter-rotating magnetic field phasors are produced by the single coil?

    <p>Two</p> Signup and view all the answers

    At what angles do the counter-rotating magnetic field phasors cancel each other out in a single-phase induction motor?

    <p>90° and -90°</p> Signup and view all the answers

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