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Voltage question

  1. May 31, 2005 #1
    Voltage question....

    Hi; Could somebody please help me with the following question: Suppose you want to run some apparatus that is 62.3 m from an electric outlet. Each of the wires connecting your apparatus to the 120 V source has a resistance per unit length of 0.00600 ohms/m. If your apparatus draws 3.30 A, what will be the voltage drop across the connecting wires? I'm really confused about this question, could someone please help. Thank you.
     
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  3. May 31, 2005 #2

    OlderDan

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    You know the current and the resistance of each wire. You can calculate the voltage drop accross each wire.
     
  4. May 31, 2005 #3

    HallsofIvy

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    It's just multiplication. You are given the "voltage drop per meter": that is V/d and are asked to find V for given distance. Have you considered the fact that
    (V/d)(d meter)= V?
     
  5. May 31, 2005 #4

    OlderDan

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    The problem gives "ohms per meter". That could be converted to a "voltage drop per meter" by multiplying by the current, or you can multiply by the distance to find the total resistance and then multiply by the current to find the voltage drop.
     
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