Magnetic Properties Units Quiz
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Questions and Answers

What is the symbol for Magnetomotive force?

  • H
  • B
  • F (correct)
  • Φ
  • Who introduced the unit of Gilbert for magnetic properties?

  • James Clerk Maxwell
  • Karl Friedrich Gauss
  • William Gilbert (correct)
  • Nikola Tesla
  • What is the SI unit for magnetic flux density?

  • Oersted (Oe)
  • At/m
  • Tesla (T) (correct)
  • Gauss (G)
  • What does the nucleus of an atom contain?

    <p>Protons and neutrons</p> Signup and view all the answers

    Which scientist is associated with the unit of Maxwell (Mx) for magnetic properties?

    <p>James Clerk Maxwell</p> Signup and view all the answers

    What do valence electrons control in an atom according to the text?

    <p>Chemical and electrical properties</p> Signup and view all the answers

    According to Gauss's law for electricity, how can the electric field due to electric charges be derived?

    <p>By Coulomb's Law</p> Signup and view all the answers

    What does Gauss’ law for magnetism state about the net magnetic flux through any closed surface?

    <p>It is always zero</p> Signup and view all the answers

    According to Ampere’s law, what can produce magnetic fields apart from electric currents?

    <p>Changing electric fields</p> Signup and view all the answers

    What property do particles need to possess in order for the electromagnetic field to exert a force on them?

    <p>Electric charge</p> Signup and view all the answers

    In electromagnetism, what does Faraday’s law of induction describe?

    <p>Production of electric fields due to changing magnetic fields</p> Signup and view all the answers

    What does Gauss’s law for magnetism say about the behavior of magnetic field lines within a closed surface?

    <p>They form closed loops entering and exiting the surface</p> Signup and view all the answers

    What is the phase shift angle when the power factor is 0.95?

    <p>18.19°</p> Signup and view all the answers

    What is the current through the motor when the power factor is 0.95 and R = 6.0 amp?

    <p>7.6 A cos 38.09</p> Signup and view all the answers

    What is magnetomotive force (mmf) analogous to in electric circuits?

    <p>Electric voltage (emf)</p> Signup and view all the answers

    What are the forces between magnets primarily caused by?

    <p>Moving electric charges in atoms</p> Signup and view all the answers

    What is the total field effect or 'substance' of a magnetic field analogous to in electric circuits?

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

    What material were the first known magnets made of?

    <p>Lodestones (Fe3O4)</p> Signup and view all the answers

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