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Homework Help: What is the procedure here!

  1. Feb 26, 2010 #1
    1. The problem statement, all variables and given/known data

    The damage caused by electric shock depends
    on the current flowing through the body;
    1 mA can be felt and 5 mA is painful. Above
    15 mA, a person loses muscle control, and 70
    mA can be fatal. A person with dry skin has a
    resistance from one arm to the other of about
    1.1 × 10^5
    . When skin is wet, the resistance
    drops to about 5100
    .
    What is the minimum voltage placed across
    the arms that would produce a current that
    could be felt by a person with dry skin?
    Answer in units of V.


    2. Relevant equations

    V=R*I



    3. The attempt at a solution

    i want to know the procedure to solve this problem
    i have tried, but i don't quite understand the problem
     
    Last edited: Feb 26, 2010
  2. jcsd
  3. Feb 26, 2010 #2

    collinsmark

    User Avatar
    Homework Helper
    Gold Member

    You haven't specified the units of resistance, but assuming you have them there with you, the resistance is "R" in the equation. The current is expressed as "I" in the equation. "V" is the voltage. And you have the equation V = IR, so...
     
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