am I wrong or my Instructor?

Discussion in 'Homework Help' started by ][ Shocked ][, Oct 9, 2009.

  1. ][ Shocked ][

    Thread Starter Member

    Apr 13, 2009
    22
    0
    hello everybody


    look with me at this picture


    [​IMG]

    it's a sinusal source

    and what I know is that sinusal doesn't have polarity
    and the current throw it is alternating

    and here he is drawing polarities for the sourse




    am I wright? :confused:
     
  2. Ratch

    New Member

    Mar 20, 2007
    1,068
    3
    ][ Shocked ][

    I think he is trying to indicate that the phase reference for all three voltage sources are at the center node "n".

    By the way, right does not have a "w", but wrong does.

    Ratch
     
  3. ][ Shocked ][

    Thread Starter Member

    Apr 13, 2009
    22
    0
    ok, so he is wrong

    and thank u for correcting me ^^
     
  4. t_n_k

    AAC Fanatic!

    Mar 6, 2009
    5,448
    782
    Not necessarily - Ratch explained your teacher is probably trying to indicate what the relative phase relationships of the individual phase voltages are with respect to the common or neutral 'n' connection. True - it's not the best way to do this and probably leads to confusion (as you have experienced!). It will be an acceptable convention for some people.
     
  5. ][ Shocked ][

    Thread Starter Member

    Apr 13, 2009
    22
    0
    ok, im getting it now

    thx alot guys
     
  6. GetDeviceInfo

    Senior Member

    Jun 7, 2009
    1,571
    230
    for reference sake, you are looking at the circuit in some point of time. It could just have easily been the opposite polarities. I'm sure the point of the exercise was to relate to the differences between the circuit nodes, not the difference in time.
     
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