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Phasors and AC-current

  1. Dec 29, 2008 #1
    Hi all.

    If I have a current going from A to B with a phase of 0.78 (radians) at time t, and a current going from B to A with a phase of 0.78+Pi = 3.93 at the same time t, does this mean that the currents are going the same way?

    Thanks in advance.

  2. jcsd
  3. Dec 29, 2008 #2


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    Gold Member

    all that's really crucial is that their phase difference is pi, so their graphs over time will look like this:

    http://www.4815162342.org.uk/e014b2.gif [Broken]
    (note, if you wanted it to perfectly match your situation, you could move the x-y axes over a pinch, but it would be the same result.)

    From the graphic it appears the two currents are always pointing opposite directions, however your problem states that one current is "from A to B" and the other is "from B to A" so one of them will be flipped and line up with the other one. So they do go the same direction over time.
    Last edited by a moderator: May 3, 2017
  4. Dec 29, 2008 #3
    Thanks for taking the time to plot the graphics and for answering.

    Have a happy New Year.
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