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Homework Help: Energy stored before and after in the capacitor

  1. Jun 16, 2009 #1
    1. The problem statement, all variables and given/known data

    A 1microf capacitor is charged to 20V and is connected in parallel to a 2microf capacitor charged to 16V. how much energy is stored before and after connection?

    please anyone can help me with this problem
    Thanks in advance

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Jun 16, 2009 #2


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    Welcome to PF!

    Hi Ankitshyani! Welcome to PF! :wink:

    (have a mu: µ :wink:)

    What is the usual formula for energy of a capacitor?

    Show us how far you get, and where you're stuck, and then we'll know how to help! :smile:
  4. Jun 17, 2009 #3
    hi there,

    how are you....the formula for energy stored in the capacitor is: W = 1/2 C V .....

  5. Jun 17, 2009 #4


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    No, CV is the charge of a capacitor …

    go back to your book and study it again. :wink:
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