Help with finding total resistance in this series parallel circuit

Discussion in 'Homework Help' started by kochere18, Jan 25, 2016.

  1. kochere18

    Thread Starter New Member

    Jan 25, 2016
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    So my assignment was to build this circuit in multisim and measure all the values for the completed circuit as well as with defects (R2 shorted, R2 open, etc.). So I got all of the measurements fine but the next part requires you to take the circuit with a defect, and write down all the steps and calculations for analyzing the circuit. So I know to begin with a series parallel circuit you should find Rt, but I am confused with this specific circuit on what is series and parallel and how to add them up. So all I need to know is how I would calculate the total resistance using standard methods, and how would I then calculate it assuming R2 is open?
     
  2. WBahn

    Moderator

    Mar 31, 2012
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    You need to show YOUR best attempt to work YOUR homework. Don't worry about it being completely correct, just take your best shot. That gives us a starting point to work from.
     
  3. kochere18

    Thread Starter New Member

    Jan 25, 2016
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    I understand and have given many attempts working out how I personally would have added them up. However I have now heard for this specific circuit that it cannot be looked at with typical series parallel parameters and must use a transformation which I have not even slightly touched in my classes yet. Since I have all the measured values like the paper said I wonder if I should just put Rt as a given and go from there doing typical series parallel analysis
     
  4. kochere18

    Thread Starter New Member

    Jan 25, 2016
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    I find it funny however that my post is being looked at as cheating or trying to get by on my homework when I see many more like it getting much more help, maybe its just that I have a new account?
     
  5. WBahn

    Moderator

    Mar 31, 2012
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    Where are all these attempts that you have given? I don't see a single one.

    Based on your description, you are never asked to find Rt for the circuit as given, but only with the various defects.

    As I said, we need a starting point. How can we tall you where you are going wrong if you won't show us where you went?
     
  6. WBahn

    Moderator

    Mar 31, 2012
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    Who said your post is being looked at as cheating. It is a simple matter of not being able to help you correct your mistakes if we can't see your mistakes to begin with.
     
  7. shteii01

    AAC Fanatic!

    Feb 19, 2010
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    R1 and R3 are in series. Can you find Rtotal of these two resistors?
     
  8. WBahn

    Moderator

    Mar 31, 2012
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    In the original diagram??? Or under one of the defect conditions?

    I'm actually having a hard time imagining any defect condition that would place them in series.
     
  9. shteii01

    AAC Fanatic!

    Feb 19, 2010
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    It is responsibility of OP to present information in clear and organized manner.
     
  10. Bordodynov

    Active Member

    May 20, 2015
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    I do the calculation so:

    Ex3.png
     
  11. The Electrician

    AAC Fanatic!

    Oct 9, 2007
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    I think R8 should be par(500,1.2k)
     
  12. Bordodynov

    Active Member

    May 20, 2015
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    I agree. Thank you. My mistake. I made up and forgot to fix.
     
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