Marking polarity of AC.

Discussion in 'General Electronics Chat' started by interesting_dude, Sep 16, 2013.

  1. interesting_dude

    Thread Starter New Member

    Jul 28, 2013
    I have read thoroughly first two chapters about AC and ask: what is the sense of introducing the polarity for an AC?
    Is it made for completing the tasks like in, when reversing one source? :confused:

    Edit: I mean, if we are not going to reverse neither of sources in future, so, does it mean that then we shouldn't use these confusing polarity markings, right?!

    graduate of broken english university
  2. t_n_k

    AAC Fanatic!

    Mar 6, 2009
    It's a convention in which a negative sign equates to a 180° electrical phase shift relative to other sources or some assumed or implied reference phase.