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Topic 7 - Electric and Magnetic Fields - Magnetic Flux and Flux Linkage
6問 • 2年前
  • Oluwole Akande
  • 通報

    問題一覧

  • 1

    What is Magnetic Flux Density

    A measure of the number of magnetic field lines passing a region of space per unit area - magnetic flux per unit area

  • 2

    What is Magnetic Flux

    A measure of the number of magnetic field lines passing through a region of space (product of Flux Density and Area, when the field is perpendicular to the area)

  • 3

    What is Magnetic Flux Linkage

    The product of the magnetic flux and the number of turns on a coil through which a field passes

  • 4

    Magnetic Flux, ϕ (Webers, Wb) =

    Field Strength, B (Tesla, T) × Area, A (metres², m²) × Cos(Angle between the field lines and the normal of the surface)

  • 5

    Magnetic Flux Linkage, Nϕ (Webers, Wb) =

    Magnetic Flux, ϕ (Webers, Wb) × Number of Coils in the Wire, N , Magnetic Field Strength, B (T) × Area, A (m²) × Number of Coils, N × cosθ, where θ is the angle between the coil and the field lines

  • 6

    How can we demonstrate how flux linkage changes with the angle using this apparatus

    We know that the field is uniform and will move in the same direction as the spring, and that the alternating current will vary the flux density and therefore, the flux linkage, This will induce an EMF in the coil which is detected by an oscilloscope , The amplitude of the line produced on the oscilloscope is equal to the magnitude of the induced EMF, Rotating the coil by a number of degrees changes the induced EMF , This allows a graph of EMF against the angle to be drawn, showing the relationship between flux linkage and the angle between the normal to the coil and the field

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    問題一覧

  • 1

    What is Magnetic Flux Density

    A measure of the number of magnetic field lines passing a region of space per unit area - magnetic flux per unit area

  • 2

    What is Magnetic Flux

    A measure of the number of magnetic field lines passing through a region of space (product of Flux Density and Area, when the field is perpendicular to the area)

  • 3

    What is Magnetic Flux Linkage

    The product of the magnetic flux and the number of turns on a coil through which a field passes

  • 4

    Magnetic Flux, ϕ (Webers, Wb) =

    Field Strength, B (Tesla, T) × Area, A (metres², m²) × Cos(Angle between the field lines and the normal of the surface)

  • 5

    Magnetic Flux Linkage, Nϕ (Webers, Wb) =

    Magnetic Flux, ϕ (Webers, Wb) × Number of Coils in the Wire, N , Magnetic Field Strength, B (T) × Area, A (m²) × Number of Coils, N × cosθ, where θ is the angle between the coil and the field lines

  • 6

    How can we demonstrate how flux linkage changes with the angle using this apparatus

    We know that the field is uniform and will move in the same direction as the spring, and that the alternating current will vary the flux density and therefore, the flux linkage, This will induce an EMF in the coil which is detected by an oscilloscope , The amplitude of the line produced on the oscilloscope is equal to the magnitude of the induced EMF, Rotating the coil by a number of degrees changes the induced EMF , This allows a graph of EMF against the angle to be drawn, showing the relationship between flux linkage and the angle between the normal to the coil and the field