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Homework Help: A pretty challenging physics Q

  1. Feb 20, 2005 #1
    hey guyz, this Q is pretty hard. I think.

    Identical point charges (+50uC) are placed at the corners of a square with sides of 2.0-m length. How much external energy is required to bring a fifth identical charge from infinity to the geometric center of the square?

    Thnaks guyz
     
  2. jcsd
  3. Feb 20, 2005 #2

    dextercioby

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    Well,what did u do...?It's not that hard...

    Daniel.
     
  4. Feb 20, 2005 #3
    What is the relationship between the work done to move a charge to point A from infinity and the voltage at point A relative to infinity?
     
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