Magnetic Field Intensity and Flux Density Relationship Quiz
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Questions and Answers

What happens if the flux linking a coil changes?

  • Permeability in a vacuum increases
  • Flux density decreases
  • The coil size increases
  • An emf is induced in the coil (correct)

    • How can the flux linking a coil be changed?

  • By changing the size of the coil (correct)
  • By increasing the coil size
  • By decreasing the magnetic field intensity
  • By adjusting the coil's resistance

    • According to Lenz's Law, what is the direction of the induced emf when the current through a coil increases?

  • It opposes the increase in current (correct)
  • It remains constant
  • It is perpendicular to the coil
  • It aids the increase in current

    • What does the equation e = dΦ / dt represent?

    <p>Change in flux with respect to time</p> Signup and view all the answers

    How is flux linkage calculated for an 'N' turns coil?

    <p>'N' multiplied by flux</p> Signup and view all the answers

    What is the torque experienced by a current-carrying coil when placed in a uniform magnetic field?

    <p>$T = pm xB$</p> Signup and view all the answers

    What is the magnetic moment of a coil with 'n' turns carrying current 'i' and area 'A'?

    <p>$pm = NiA$</p> Signup and view all the answers

    In the context of magnetic fields, what does the permeability in a vacuum represent?

    <p>Ability of a material to be magnetized</p> Signup and view all the answers

    What is the relationship between the current 'i' and the magnetic field 'B' according to the right-hand screw rule?

    <p>'i' and 'B' are mutually perpendicular</p> Signup and view all the answers

    How is the magnetic moment 'pm' related to the area 'A' and current 'i' of a loop?

    <p>$pm = iA$</p> Signup and view all the answers

    What is the formula for the magnetic force 'F' experienced by an elementary length of conductor 'dl' carrying current 'i' in a magnetic field 'B'?

    <p>$F = dq(dl / dt)B$</p> Signup and view all the answers

    What is the relationship between magnetic flux density (B) and magnetic field intensity (H) in a vacuum?

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

    Which physical property is intermediate between electric currents and flux density when considering magnetic flux produced by electric currents?

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

    What does Ampere’s Circuital Law relate to magnetic flux intensity (H) and the current producing it?

    <p>Current density at any point in the conductor</p> Signup and view all the answers

    If a closed path around a current-carrying conductor is a circle of radius r, what is the expression for the magnetic field intensity (H)?

    <p>H = i / 2Πr</p> Signup and view all the answers

    Which statement is true about the relationship between vectors B and H?

    <p>Vectors B and H are co-linear.</p> Signup and view all the answers

    What does magnetic flux in a vacuum depend on?

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

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