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How to find equipotential surface for given case?

  1. Jan 6, 2016 #1
    Q:- Describe equipotential surface due to a uniform grid consisting of long equally spaced parallel charged wires in a plane.
    The answer given in my textbook is - Equipotential surface have shape which changes periodically. At far off distances it becomes parallel to the plane.

    Why the equipotential surface changes periodically here?Please Explain.
    Any help would be appreciated.
  2. jcsd
  3. Jan 6, 2016 #2
    I can answer the second question. At far off distances the grid should look like a uniformly charged plane. This results in the potential being equivalent to that of a uniformly charged plane.
  4. Jan 6, 2016 #3
    Because the charge distribution changes periodical (wire - no wire - wire - no wire - ...).
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