Quiz question - Thevenin and Norton Circuits.

Discussion in 'Homework Help' started by J.live, Oct 12, 2010.

  1. J.live

    Thread Starter Member

    Sep 10, 2010
    35
    0
    Which of it is true


    Edit
    I am not sure how to do this one.

    15 ll 10 = 6

    10 ll 10 = 5

    RL= 11 ? I know this is wrong.

    Va = 30 x ( 10 / 10 +5 )= 2

    Va' = 30 x ( 10 / 10 +10 )= ?

    I am having trouble splitting the RL and Vth

    I am totally lost on this one.

    P.S sorry for not showing work before .
     
    Last edited: Oct 12, 2010
  2. ELECTRONERD

    Senior Member

    May 26, 2009
    1,146
    16
    What do you mean which of it is true? Is there a question that came with the problem? Provide your work first, before you expect us to do it for you.
     
  3. J.live

    Thread Starter Member

    Sep 10, 2010
    35
    0
    Yeah, reposted the question.
     
    Last edited: Oct 12, 2010
  4. Georacer

    Moderator

    Nov 25, 2009
    5,142
    1,266
    The circuit doesn't give you enough information to calculate R_L and it doesn't want you to either.

    You need to convert the circuit to its Thevenin equivalent. Read here for info: http://www.allaboutcircuits.com/vol_1/chpt_10/8.html

    What you also need to know is that in order to have maximum power transfer, the R_{th} must be equal to R_L.
     
  5. JoeJester

    AAC Fanatic!

    Apr 26, 2005
    3,373
    1,159


    Attached is one way ....

    After you do the calculations, test each answer till you find which one is true, if any.
     
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