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## Homework Statement

For the cicuit shown, the voltage is 200V, C1= 4microF, C2= 15microF and C3= 12microF

(i drew it on paint)

Find

a) the equivalent capacitance between the terminals

b) the charge stored on each capacitor

c) the total stored energy

## Homework Equations

Ceq= 1/c1 + 1/c2 +1/c3

or

Ceq = C1+C2+C3

C=Q/V

I think this is the right equation for the energy stored in a capacitor:

U= QV/2=CV^2/2

## The Attempt at a Solution

Ok i'm really not sure because i'm having a lot of trouble with figuring circuits out. I think C1 and C2 are in series but in parallel with C3. For a) what i did is :

Ctot = 1/Ceq + C3

and

1/Ceq = 1/C1 + 1/C2

Therefore Ct = 3.15microF + 12microF

Ct= 15.15microF

b) I would use C= Q/V

so Q1 = 8*10^-4 C

Q2= 3*10^-3 C

Q3= 2.4*10^-3 C

c) U=CV^2/2

my equivalent capacitance was 15.15microF and my voltage was 200v, therefore my U should be 0.303J

It seems to me that b and c were too easy to get. Besides, i'm not even sure my a) part is right. I'm so confused....

the picture i drew is at the bottom, it's just pending approval.

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