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Home ‣ Electrical Engineering ‣ Three-Phase Systems in Power Applications See What Others Are Saying!
  • Question

  • The stator is the rotating assembly in a generator or motor.


  • Options
  • A. True
  • B. False

  • Correct Answer
  • False 

    Explanation
    The two main parts of a generator or motor can be described in either mechanical or electrical terms:

    Mechanical:

    Rotor: The rotating part of an electrical machine
    Stator: The stationary part of an electrical machine

    Electrical:

    Armature: The power-producing component of an electrical machine. In a generator, alternator, or dynamo the armature windings generate the electric current. The armature can be on either the rotor or the stator.
    Field: The magnetic field component of an electrical machine. The magnetic field of the dynamo or alternator can be provided by either electromagnets or permanent magnets mounted on either the rotor or the stator.

    • More questions

    • 1. When converting 7,000 nA to microamperes, the result is

    • Options
    • A. 0.007 ľA
    • B. 0.7 ľA
    • C. 700 ľA
    • D. 7 ľA
      • Discuss
    • 2. A series circuit has a 24 V source and a total resistance of 120 Ω. The current through each resistor is

    • Options
    • A. 24 mA
    • B. 200 mA
    • C. 120 mA
    • D. 20 mA
      • Discuss
    • 3. In a parallel circuit, the branch with the lowest resistance has the most current.

    • Options
    • A. True
    • B. False
      • Discuss
    • 4. How many degrees are there in Π/3 rad?

    • Options
    • A. 6°
    • B. 60°
    • C. 180°
    • D. 27°
      • Discuss
    • 5. In an electric circuit, the reaction of a circuit to a given pulse input is known as the pulse response.

    • Options
    • A. True
    • B. False
      • Discuss
    • 6. When an open circuit occurs in a parallel branch, the total resistance decreases.

    • Options
    • A. True
    • B. False
      • Discuss
    • 7. The quantity 43 × 10-3 is the same as

    • Options
    • A. 0.043
    • B. 0.430
    • C. 430
    • D. 43,000
      • Discuss
    • 8. The resistor voltage is always out of phase with the current.

    • Options
    • A. True
    • B. False
      • Discuss
    • 9. Transistors act basically as voltage sources.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. At a certain frequency, the output voltage of a filter is 6 V and the input is 12 V. The voltage ratio in decibels is

    • Options
    • A. 6.02 dB
    • B. ?6.02 dB
    • C. 12.04 dB
    • D. ?12.04 dB
      • Discuss

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