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Homework Help: Electric Field and Voltage Equation Applications

  1. Jul 16, 2013 #1
    I have two questions!

    General: A uniform circular ring of charge Q and radius R is located in the x-y plane, centered on the origin as shown in the figure.

    #1 What is the magnitude of the electric field, E, at point P located a distance z above the center ring?

    I came up with kQ/(R^2 + z^2). I would like to know if this is correct or where I went wrong, and how to disprove other answers!

    #2 What is the voltage at location P, assuming the voltage at infinity is zero?

    Any help is appreciated! Thanks in advanced!

    Attached Files:

  2. jcsd
  3. Jul 16, 2013 #2


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    2017 Award

    Staff: Mentor

    Which electric field do you expect in the center of the ring? Does your equation give the same result?

    And your attempt to solve the problem?
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