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Homework Help: Capacitance question

  1. Feb 24, 2010 #1
    1. The problem statement, all variables and given/known data

    A 24-µF capacitor has an electric potential difference of 30 V across it. What is the charge on the capacitor?

    2. Relevant equations

    kq1q2/r2?, q/change in V?

    3. The attempt at a solution
    ive tried looking through my notes but i was absent dont understand this if you could give me a step by step i would appreciate it.
    Last edited: Feb 24, 2010
  2. jcsd
  3. Feb 24, 2010 #2


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    Homework Helper

    Hi isuck@physics, welcome to PF.
    The relevant equation given by you is wrong. Search for the relation between capacitance , potential difference and the charge in a capacitor.
  4. Feb 24, 2010 #3
    Do you really understand the concept of capacitance?
    Just put the figures into the formula of definition
    C = \frac{q}{U}
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