another small problem

Discussion in 'Feedback and Suggestions' started by bputter, Apr 27, 2007.

  1. bputter

    Thread Starter New Member

    Apr 27, 2007
    In Vol II, I believe there is a problem with the polarity of the ac power supplies in Figure 2.13. I am looking at the .pdf version, not sure about the others
  2. Dave

    Retired Moderator

    Nov 17, 2003
    Hi bputter,

    Can you be more specific about the problem? Link to the e-book chapter, a more detailed description of the problem and why you think it is incorrect.


  3. Dcrunkilton

    E-book Co-ordinator

    Jul 31, 2004
    The explanation is in the equation image preceding PDF figure 2.13 which is shown here
    If you are concerned about the 8 V battery polarity being reversed, the DC battery cannot have a phase angle. However, it can have the polarity revesed to account for the 180 phase of the 8V angle 180 AC source. The 8V battery polarity is reversed to repersent the AC 8V angle 180 source.
    The polarity of the 2V DC meter is reversed form the 2 V angle 180 meter for the same reason.

    The polarities look OK to me.