Need Help! Urgent! Circuits

Discussion in 'Homework Help' started by smarch, Apr 27, 2010.

  1. smarch

    Thread Starter Active Member

    Mar 14, 2009
    52
    0
    Hi everyone,
    I'm really terrible at RLC circuits etc, these are two problems I'm having trouble with. I have attached schematics of them.

    The first circuit, it says use thevenins theorem, determine the I in the 15
    Ω resistor and the voltage Vab of the AC circuit. I know I am meant to use a delta star transformation to determine the thevenin impedance, but I just don't know where to start!

    The second circuit says to use norotns theorem to determine the current in the 15
    Ω resistor of the AC circuit. Again I don't know why but when it comes to using capacitors and angles etc in circuits, i get confused!

    Please someone help, a step by step guide to solving these circuits?

    Thanks!
     
    Last edited: Jun 23, 2010
  2. kingdano

    Member

    Apr 14, 2010
    377
    19
  3. retched

    AAC Fanatic!

    Dec 5, 2009
    5,201
    312
    I thought classes WERE step-by-step guides to solving these problems?

    Oh, school kids.

    Where are you having the trouble?

    What have you done so far?
     
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