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Finding an unknow value of resistance (HELP REQUIRED )

  1. Mar 31, 2009 #1
    finding an unknow value of resistance (HELP REQUIRED!!!)

    1. The problem statement, all variables and given/known data

    Two resistors in parallel, R1 of 470 ohms and R2 of unknow value, are connected in series with two more parallel resistors R3 of value 1kohm and R4 of value 270 ohms. The supply is 110 V dc and the potential difference across the parallel pair of resistors R3 and R4 is 60V.

    Ive been looking at this question for a while and a bit of help would be greatly appreciated.

    Determine the value of resistance R2


    2. Relevant equations

    V1 = (R1/R1+R2) Vin

    Transposed to find R2. Ive came out at an answer of 564 ohms. Anyone able to check im correct and help me on this problem? Thanks in advance

    3. The attempt at a solution
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Mar 31, 2009 #2

    tiny-tim

    User Avatar
    Science Advisor
    Homework Helper

    Welcome to PF!

    Hi Adamnufc1! Welcome to PF! :wink:

    Show us your full calculations, and then we can see what went wrong, and we'll know how to help. :smile:
     
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