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Capacitance Ct, Qt problems.

  1. Nov 5, 2009 #1
    1. The problem statement, all variables and given/known data
    Find the equivalent capacitance of the capacitor combination, Ct and the charge over C5:Q5
    Vab=10V
    C1=3uF
    C2=11uF
    C3=12uF
    C4=6uF
    C5=9uF

    2. Relevant equations

    1) 1/Ct=1/C1+1/C4 = 2uF
    2) 1/Ct= 1/C2+1/C5 = 99/20uF

    Parallel:
    2+99/20+12=379/20uF

    Ct=379/20 uF

    Charge over Q5:C5

    Im failing at this part:
    Q5=C5=V

    3. The attempt at a solution
    Im failing at this part:
    Q5=379/20*10-6= 1.895-4uC
     

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  2. jcsd
  3. Nov 5, 2009 #2

    rl.bhat

    User Avatar
    Homework Helper

    Hi apatuka, welcome to PF.
    In the given circuit, the charges on C2 and C5 are the same. The voltage across them is given. Find the charge. Then find Q5:C5
     
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