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Homework Help: Capacitor Design

  1. Jun 28, 2008 #1
    1. The problem statement, all variables and given/known data

    You must design a capacitor capable of storing 4.50 × 10-7 C of charge, but you only have a 220- V power supply and two metal plates of area 0.375 m2 each. What is the largest value the plate separation can be so that you can accomplish the task?

    2. Relevant equations

    V = Q*d/A*epilson 0

    3. The attempt at a solution

    I solved for d, and got 1.62E-2 m. Again, don't know what I am doing wrong here.
  2. jcsd
  3. Jun 29, 2008 #2


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    Homework Helper

    Hi purduegirl,

    That's not quite the answer I get from your equation. Why don't you calculate it again; if you still get the same thing, please show what equation you got when you solved for d and then exactly the numbers you plugged in your calculator.
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