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Homework Help: Finding the units of p

  1. Nov 30, 2008 #1
    1. The problem statement, all variables and given/known data

    rearrange to make p the subject then work out the units for p

    R - resistance or wire
    A - area in m2
    l - length

    2. Relevant equations

    R=pl/A


    3. The attempt at a solution

    p = AR/l

    (m2 x m2kgS-3A-2)/m

    Resistance is ohms which is m2kgS-3A-2 I think.

    p=m3kgS-3A-2
     
    Last edited: Nov 30, 2008
  2. jcsd
  3. Nov 30, 2008 #2
    Yes, your working is right. The units for resistivity is the ohm.metre or m3kgs-3A-2
     
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