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Homework Help: Electricity and Magnetism in a Thundercloud

  1. Nov 27, 2007 #1
    Magnetism and Potential Energy

    1. The problem statement, all variables and given/known data
    http://www.collegeboard.com/prod_downloads/ap/students/physics/physics_c_em_frq_01.pdf" [Broken]

    2. Relevant equations
    U=[tex]\frac{k_{e}q_{1}q_{2}}{r}[/tex]
    E=[tex]\frac{F}{q}[/tex]
    V=[tex]\frac{U}{q}[/tex]

    [tex]k_{e}[/tex]=8.99x10[tex]^{9}[/tex]

    3. The attempt at a solution
    I have a start on the questions:
    (a) Down
    (b)i. Down
    ii. Equal because the distance does not matter because they are on equipotential lines.
    (c) I don't understand the question very well, but I said it was 0
    (d) U=[tex]\frac{8.99x10^{9}*30*-30}{3}[/tex] = 2.697x10[tex]^{12}[/tex]
    (e) 0

    I hope you guys can help me out.
     
    Last edited by a moderator: May 3, 2017
  2. jcsd
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