# Isaac physics Two Cs and Three Rs

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#1
Could someone please help me with part band c of this question. I have done part a and got S2 and S3.
https://isaacphysics.org/questions/t...d-5d7cabf77076
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1 month ago
#2
(Original post by amell1234)
Could someone please help me with part band c of this question. I have done part a and got S2 and S3.
https://isaacphysics.org/questions/t...d-5d7cabf77076
Do you know Kirchhoff's Laws?

If yes, write the Kirchhoff's voltage and current law for part B in terms of the unknown currents in R1, R2 and R3.

Spoiler:
Show
Treat the capacitors as battery
0
#3
(Original post by Eimmanuel)
Do you know Kirchhoff's Laws?

If yes, write the Kirchhoff's voltage and current law for part B in terms of the unknown currents in R1, R2 and R3.

Spoiler:
Show
Treat the capacitors as battery
Hi, yes I do know Kirchhoff's laws. I have tried using them but I carry on getting the wrong answer. Here is my working:

I think the mistake may be in what the voltage supplied by each capacitor is as I am unsure as to how the 2.4V from the battery splits between them?
Thank you so much.
0
1 month ago
#4
(Original post by amell1234)
Hi, yes I do know Kirchhoff's laws. I have tried using them but I carry on getting the wrong answer. Here is my working:

I think the mistake may be in what the voltage supplied by each capacitor is as I am unsure as to how the 2.4V from the battery splits between them?
Thank you so much.
Your issue lies at setting the wrong equation for equation 3. Revise your Kirchhoff's votlage laws.

(Original post by amell1234)
…I am unsure as to how the 2.4V from the battery splits between them?
I think you have the correct concept for this based on your calculation.
Both capacitors have the same charge, so the p.d. across C1 is Q/C1, etc.
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2 weeks ago
#5
(Original post by amell1234)
Could someone please help me with part band c of this question. I have done part a and got S2 and S3.
https://isaacphysics.org/questions/t...d-5d7cabf77076
Sorry for bumping a month old thread.

I was wondering if you still needed some help solving the problem, since I just did it and it also took me quite some time since I kept on making silly mistakes in the system of equations. However, I have completely understood it now and it was quite a fun problem in my opinion
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