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Homework Help: Charged ring and charged particle problem

  1. Sep 27, 2011 #1
    The Problem is as follows:
    A ring of diameter 7.50 is fixed in place and carries a charge of 5.50 uniformly spread over its circumference.

    A) How much work does it take to move a tiny 3.80 micro-columb charged ball of mass
    2.00g from very far away to the center of the ring?

    B) What is the maximum speed it will reach?

    -- I honestly have no idea where to start with this problem.--
  2. jcsd
  3. Sep 27, 2011 #2


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    What is the electric potential at the center of the ring due to the charge on the ring? (Ignore, for a moment, the charged ball.)
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