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Homework Help: Electricity and Power

  1. Feb 14, 2010 #1
    1. The problem statement, all variables and given/known data

    An electric utility company supplies a customer's house from the main power lines (115 V) with two copper wires, each of which is 53.6 m long and has a resistance of 0.125 Ω per 294 m. Calculate the voltage at the customer's house for a load current of 110 A.

    Correct : 1.10E+02 V

    9. [1 point, 10 tries]
    For this load current, calculate the power that the customer is receiving.


    2. Relevant equations

    P=V*I ?

    3. The attempt at a solution

    I tried subbing in voltage at the house, voltage before the power lines (so 112.5 and 115 ) and these don't work...
  2. jcsd
  3. Feb 14, 2010 #2
    I would take the voltage at the customer's house that you already calculated mutiplied with the load current.
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