Small Nortons Theorem Question

Discussion in 'Homework Help' started by RotatingEmu, Jun 15, 2007.

  1. RotatingEmu

    Thread Starter Member

    Jun 15, 2007
    Hi, The question I have is stated:

    Determine the Norton Equivalent circuit of a two-terminal DC network given the results of the following two measurements: a short-circuit across the output terminals yields a current 0.2A; and a 300 ohm resistor connected across the output terminals gives a voltage of 15V.

    Now I gather that the Norton Current output is 0.2A but I cannot work out the Norton Resistance.

    Any help appreciated.
  2. RotatingEmu

    Thread Starter Member

    Jun 15, 2007
    I dont know if its right or wrong but I come up with a resistance of 100 ohms for the Norton Resistance. Hopefully the picture i drew shows how I calculated R(norton) = 100 ohms.
  3. Ron H

    AAC Fanatic!

    Apr 14, 2005
    Looks good!
  4. hgmjr

    Retired Moderator

    Jan 28, 2005
    You appear to have figured it out. Congratulations!

    I am surprised that you were so uncertain in your original posting?

  5. RotatingEmu

    Thread Starter Member

    Jun 15, 2007
    Thanks for the reassurance. I came up with a few different answers and decided that one was the most logical in its derivation.

    Also, I get confused with the resistor being in parallel with the current source when its a Norton Circuit but in series with the Voltage source in the Thevenins Circuit, and yet both resistances are said to have the same value. Im sure ill grasp it in time. Thanks again.
  6. recca02

    Senior Member

    Apr 2, 2007
    current sources and voltage sources are dual of each other.
    the effects of the configurations are same.
    try cross checking by calculation.