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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?
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?
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?
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?
In a single-phase induction motor, how many counter-rotating magnetic field phasors are produced by the single coil?
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At what angles do the counter-rotating magnetic field phasors cancel each other out in a single-phase induction motor?
At what angles do the counter-rotating magnetic field phasors cancel each other out in a single-phase induction motor?
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