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How do you calculate the total resistance?

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  1. Nov 21, 2015 #1
    1. The problem statement, all variables and given/known data
    What is the Total resistance in Question 38.

    2. Relevant equations


    3. The attempt at a solution
    I tried drawing the circuit again splitting up the series and parallel but i got the wrong answer. The answer is 92. Like i know that the 60 is parallen to 15 and the 15 is parallel to 10. The 15 and 5 are in series and the 20 and 10 are in series and maybe also 5.
     

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    Last edited: Nov 22, 2015
  2. jcsd
  3. Nov 21, 2015 #2
    "3. The attempt at a solution"
     
  4. Nov 22, 2015 #3

    ehild

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    You took all the 60 Ω, 15Ω, 20Ω, 10Ω, 5 Ω resistors parallel; they are not.
     
  5. Nov 22, 2015 #4
    So what now
     
  6. Nov 22, 2015 #5

    ehild

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    The ammeter can be replaced by a single wire. How are the 10Ω and 20Ω resistors connected?
     
  7. Nov 22, 2015 #6
    Well, it doesnt say. It's just in series judging by the diagram
     
  8. Nov 22, 2015 #7

    ehild

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    You need to use the diagram.
    Yes, they are in series. What is their resultant? How that resultant is connected to the 15 Ω resistor?
     
  9. Nov 22, 2015 #8
    Resultant? like 10 + 20 = 30 ?
     
  10. Nov 22, 2015 #9

    ehild

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    Yes. Now you replace the 10Ω and 20Ω resistors with their series equivalent. How is that 30Ω resistor connected to the 15Ω resistor?
     
  11. Nov 22, 2015 #10
    I did this earlier. Is it correct
     

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  12. Nov 22, 2015 #11

    ehild

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    The diagram is correct. What is the result?
     
  13. Nov 22, 2015 #12
    80 + 1/ (1/60 + (1/20) + (1/30) = 90 =/= 92
     
  14. Nov 22, 2015 #13

    ehild

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    Yor calculation is wrong. How are the 30Ω and 15 Ω resistors connected?
     
    Last edited: Nov 22, 2015
  15. Nov 22, 2015 #14
    wat
     
  16. Nov 22, 2015 #15

    ehild

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    ????????????????????
    I quit. Good luck.
     
  17. Nov 22, 2015 #16
    LOl. wtaf man. can you just stop beating around the bush and hit the turkey on the head already?
     
    Last edited: Nov 22, 2015
  18. Nov 22, 2015 #17

    CWatters

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    Forum rules don't allow us to just give you the answer. For why see..

    http://tinyurl.com/os67nwp

    Next step (as ehild said) is to figure out how the 30Ω and 15 Ω resistors are connected? Series? Parallel? Replace these two with their equivalent.
     
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