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Resistance and Radii Relationship

  1. May 12, 2013 #1
    The resistance of wire A is four times the resistance of wire B. Calculate the ratio of the radii of the wires
     
  2. jcsd
  3. May 12, 2013 #2

    SammyS

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    Hello anshuman3105. Welcome to PF !

    What have you tried?

    Where are you stuck?

    You need to show some effort towards obtaining a solution -- according to the rules of this Forum.


    By the way, you n would need more information to solve this problem.

    Please state the problem word for word as it was given to you.

    Then give an attempt at a solution.
     
  4. May 13, 2013 #3
    I just dont know... :(
    Please help.
     
  5. May 13, 2013 #4

    SammyS

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    Please state the problem word for word as it was given to you.

    Are the wires the same length?

    Are they made of the same material?
     
  6. May 14, 2013 #5
    the wires have the same material and same cross-sectional area
     
  7. May 14, 2013 #6
    Are you sure about this?
     
  8. May 14, 2013 #7
    Yaaa...sure..!!
     
  9. May 14, 2013 #8

    gneill

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    If they have the same cross-sectional area then they have the same radii and the ratio is fixed at 1:1. Any other information or details would be irrelevant. It therefore seems likely that you have either misinterpreted the question or are not providing the true problem statement for reasons we can only guess at.
     
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