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Homework Help: Help on conceptual potential and radii multiple choice

  1. Apr 7, 2010 #1
    help!! on conceptual potential and radii multiple choice

    1. The problem statement, all variables and given/known data

    Two positively charged metal spheres of different radii are connected by a conducting wire. Which statement is true about them?

    a. their potentials are the same
    b. their charges are the same
    c. their electric fields are constant everywhere
    d. the charge on the smaller sphere is larger

    2. Relevant equations
    V= Q/R
    change in V = -integral of E dr
    V= ED

    3. The attempt at a solution

    a. i don't think its this because potential is based on radius and if the radius is different then the potential is not the same.
    b. this could be true because if the two spheres are connected, then the charge will evenly distribute
    c. i don't think this is true because electric fields is dependent on radius
    d. this might be true because V= Q/R and so since R is smaller then V is larger so Q is larger too, being directly proportional.
    Please help!
  2. jcsd
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