Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Circuit please help? Confused about Q and C

  1. Jul 11, 2007 #1
    1. The problem statement, all variables and given/known data
    Circuit diagram: a battery connects three capacitors in the following way.

    Connects two capacitors in "parallel" and ends the circuit by connecting a capacitors in series.

    C2
    batteries { } C1 -> back to battery
    C3

    C1 = 3C
    C2 = C
    C3 = 5C

    Question: State the ranking of the capacitors according to the charge they store, from largest to smallest.


    2. Relevant equations

    V = Q / C ?
    Q1/Q2 = C1/C2 ?

    3. The attempt at a solution
    I combined C2 and C3... so let C4 be the combination of C2 and C4

    battery -> C4 -> C1 -> back to battery
    Q1/Q4 = C1/C4
    Q1/Q4 = 3C/6C

    ??? but I think I am wrong... cuz the solution says that Q1 = greatest
     
  2. jcsd
  3. Jul 11, 2007 #2
    um, i dunno why the circuit looks different than I organized in the text earlier... so please ignore

    C2
    batteries { } C1 -> back to battery
    C3
     
  4. Jul 11, 2007 #3
    Okay, nevermind... I have done more readings online and found the answer. Thanks anyway =)
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook