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Phasors for Inductors quiz

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  • What is the phase relationship between voltage and current in an inductor in an AC circuit?
    The voltage leads the current by 90 degrees in an inductor.
  • At what angle does the current in an inductor occur in an AC circuit?
    The current occurs at an angle of omega t.
  • At what angle does the voltage across an inductor occur in an AC circuit?
    The voltage occurs at an angle of omega t plus pi over 2.
  • How are the voltage and current described when they occur at different angles in an inductor?
    They are said to be out of phase.
  • In a phasor diagram for an inductor, how is the voltage phasor positioned relative to the current phasor?
    The voltage phasor is positioned 90 degrees ahead of the current phasor.
  • What does it mean for the current in an inductor to lag the voltage?
    It means the current reaches its maximum value after the voltage does.
  • How does the phase relationship in an inductor compare to that in a capacitor in AC circuits?
    In an inductor, voltage leads current, while in a capacitor, voltage lags current.
  • What does a negative and increasing current in a phasor diagram indicate about its position?
    It indicates the current phasor is in the second quadrant, moving toward the horizontal axis.
  • In which direction do phasors rotate in a phasor diagram?
    Phasors rotate counterclockwise in a phasor diagram.
  • What must be true for a phasor to be considered negative in a diagram?
    Its horizontal component must be negative, placing it on the left side of the graph.
  • If the current phasor is in the second quadrant, where is the voltage phasor for an inductor?
    The voltage phasor is 90 degrees ahead of the current phasor.
  • What is the mathematical expression for the voltage across an inductor in terms of phase angle?
    The voltage is at an angle of omega t plus pi over 2.
  • What is the key visual feature of a phasor diagram for an inductor in AC circuits?
    The voltage phasor is drawn 90 degrees ahead of the current phasor.
  • Why is it important to remember the phase relationship between voltage and current in inductors?
    Because it is the opposite of the relationship in capacitors, which helps in analyzing AC circuits.
  • What does a phasor diagram help illustrate in the context of inductors?
    It visually represents the phase difference between voltage and current in an inductor.