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equivalent capacitance

equivalent capacitance

I understand how to find equivalent capacitance, but I'm having so much trouble with this problem; I couldn't get the right answer even though I spend hours to do this problem, please help me.

The picture to the problem is the attachment

Find the equivalent capacitance of the circuit shown in the attachment.

Thanks,
abk511
12 REPLIES 12

equivalent capacitance

On 10/5/2003 1:15:22 AM, abk511 wrote:
>I understand how to find
>equivalent capacitance, but
>I'm having so much trouble
>with this problem; I couldn't
>get the right answer even
>though I spend hours to do
>this problem, please help me.
>
>The picture to the problem is
>the attachment
>
>Find the equivalent
>capacitance of the circuit
>shown in the attachment.
>
>Thanks,
>abk511

Can you post something that shows which crossings and intersections are actual connections?

TTFN,
Eden

equivalent capacitance

The problem is like that, they don't put crossing or anything like that, they just say find the equivalent capacitance of the system.

equivalent capacitance

OK, so you must be assuming that each crossing is a connection.

What did you do with the two shorts? Can you see that one short puts 3 capacitors in parallel? The other short puts two of the other capacitors in parallel.


TTFN,
Eden

equivalent capacitance

I got that part, but i'm confused how to break down the circuit to see things easier to analyze this circuit

equivalent capacitance

It's really hard to break this down, please help! I need pictures to see how do they break down. thanks

equivalent capacitance

There is nothing to break down:



TTFN,
Eden

equivalent capacitance

The connection that separate 8 uF and 6 uF, that connection also separate the 5 uF and 4 UF, is hard to analyze, please help.

equivalent capacitance

On 10/5/2003 12:23:40 PM, abk511 wrote:
>The connection that separate 8
>uF and 6 uF, that connection
>also separate the 5 uF and 4
>UF, is hard to analyze, please
>help.

That's part of doing the series-parallel analysis. Where capacitors are obviously parallel, such as the 5, 7, 8 uF, convert to a single capacitor. Likewise for the 6 and 4 uF.

I wound up with 15 uF

TTFN,
Eden

equivalent capacitance

how did you get 15 uF?, the answer for this problem in the book is 15.7 uF

equivalent capacitance

I keep on getting 3.02 uF, but that is not the right answer, please help

equivalent capacitance

Can you please tell me if you were to work out this problem, what is the equivalent capacitance?

equivalent capacitance

Thanks Eden, I got it now, i think my mistake was that i keep on thinking that we're find resistance, so i keep on using resistance formulas. Thanks!
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