Electrical Notes Telegram Channel Joining Instructions
10 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

If the instantaneous power drawn is negative for 2 milliseconds in one cycle, what is the likely power factor angle?

  • 45°
  • 18°
  • 36° (correct)
  • In an electromechanical energy conversion device, what does the developed torque depend upon?

  • stator field and rotor field strengths and the torque angle (correct)
  • stator field and rotor field strengths
  • stator field strength and torque angle
  • rotor field strength only
  • What is the likely number of poles on the rotor of an elementary cylindrical machine?

  • six
  • four (correct)
  • one
  • two
  • What is a common application of stepper motors?

    <p>control system applications</p> Signup and view all the answers

    If a current of 1 A through a coil creates a core flux of 1 mWb, what is the likely number of turns on the coil?

    <p>1000 turns</p> Signup and view all the answers

    What is the energy stored in the magnetic field of a coil with 1000 turns, a current of 1 A, and a core flux of 1 mWb?

    <p>1 J</p> Signup and view all the answers

    What is the emf induced in a conductor of a machine driven at 600 rpm, with a diameter of 2.0 meters and a length of 0.30 meters, and a peak value of flux density of 1.0 Wb/m²?

    <p>41.83 V</p> Signup and view all the answers

    What is the peak value of flux density in a machine driven at 600 rpm, with a diameter of 2.0 meters and a length of 0.30 meters?

    <p>1.0 Wb/m²</p> Signup and view all the answers

    What is the relationship between the energy stored in the magnetic field and the number of turns of a coil?

    <p>Directly proportional to the square</p> Signup and view all the answers

    What is the unit of measurement for the core flux?

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

    More Like This

    Basic Electrical Engineering Concepts Quiz
    5 questions
    BS7671:2018 Part 3 Study Notes
    10 questions

    BS7671:2018 Part 3 Study Notes

    AppealingMagicRealism avatar
    AppealingMagicRealism
    Circuit Analysis Study Notes
    5 questions
    Use Quizgecko on...
    Browser
    Browser