Fundamentals of Electromagnetism: AC Machines Module 2 Quiz
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Questions and Answers

What is the closed path followed by magnetic flux called?

  • Magnetic route
  • Magnetic circuit (correct)
  • Flux circuit
  • Electric circuit

    • What does Faraday's Law of EMI describe?

  • Relation between electric and magnetic fields
  • Relation between voltage and current
  • Induced electromotive force due to a changing magnetic field (correct)
  • Energy conservation in electromagnetic systems

    • Which machine is based on the principle of self-inductance and mutual inductance?

  • Induction motor
  • Synchronous machine
  • DC machine
  • Transformer (correct)

    • What is the constructional feature of a 1-ph transformer?

    <p>Primary winding only</p> Signup and view all the answers

    In a 3-ph induction motor, what does the torque equation describe?

    <p>Relation between torque and speed</p> Signup and view all the answers

    What is the purpose of the iron core in a coil?

    <p>To enhance magnetic flux</p> Signup and view all the answers

    What is the force behind the flow of flux or production of flux in a magnetic circuit called?

    <p>Magnetomotive force</p> Signup and view all the answers

    What is the measure of the 'opposition' the magnetic circuit offers to the magnetic flux called?

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

    What is the conducting power for magnetic lines of force or flux called?

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

    What is the magnetic flux per unit area called?

    <p>Magnetic flux density</p> Signup and view all the answers

    What is the total number of magnetic lines of force in the magnetic field called?

    <p>Magnetic flux</p> Signup and view all the answers

    What is magnetomotive force (MMF) mathematically equal to?

    <p>$NI$</p> Signup and view all the answers

    What is the measure of 'opposition' that the magnetic circuit offers to the magnetic flux mathematically equal to?

    <p>$S=\frac{NI}{\phi}$</p> Signup and view all the answers

    What does H stand for in the equation $H=\frac{NI}{l}$?

    <p>Magnetic field intensity</p> Signup and view all the answers

    What does B stand for in the equation $B=\frac{\text{Magnetic Flux}}{A}$?

    <p>$B=\frac{\text{Magnetic Flux}}{A}$</p> Signup and view all the answers

    'Permeability' relates to which two quantities in a magnetic circuit?

    <p>$B$ and $H$</p> Signup and view all the answers

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