Find the charge of Capacitor 2 in the circuit

[Tomi Kolawole]

Homework Statement

Homework Equations

I am to use korchkoffs method to solve this problem

The Attempt at a Solution

I already solved for the overall current which is the same throughout because C1 and C2 impeded current flow in sections of the circuit and i have found the charge on c1 BUT I HAVE ISSues evluating the bottom right mini-circuit containing C2 to find its charge Q2.I don't know how write its korchoff equation

 

[gneill]

What potential differences do you already know in that subcircuit?

 

[Tomi Kolawole]

all the Resistances Voltages and Capacitance are known

 

[gneill]

all the Resistances Voltages and Capacitance are known

And what are they? Can you annotate a drawing of the subcircuit with the known values of potential differences?

 

[Tomi Kolawole]

The values of the known circuit components are at the very bottom of the image.its easy to miss aha.

This is my Circuit diagram with the current direction and teminals laballed

 

[gneill]

Can you pencil in the known potential difference values on that diagram?

 

[Tomi Kolawole]

V1 is not in this subcircuit that i made but you can see it in the overall diagram in the original image

 

[gneill]

Okay, let me clarify my request. What are the potential differences across the resistors in the subcircuit?

 

[Tomi Kolawole]

Its V=IR so V=4/3 * 3 so the resistors have a V of 4 Volts
My Calculated I(current)= 4/3 and R is a given value of 3.
The capacitor is fully charged since the current (as stated in the question) has been flowing for awhile.SO i'M BASically wondering if the v2 AND R on the same branch as the capacitor (C2) will still contribute voltage even if there is no current flowing through their branch cause of the Fully charged Capacitor C2

 

[gneill]

Its V=IR so V=4/3 * 3 so the resistors have a V of 4 Volts
My Calculated I(current)= 4/3 and R is a given value of 3.

Okay.

The capacitor is fully charged since the current (as stated in the question) has been flowing for awhile.SO i'M BASically wondering if the v2 AND R on the same branch as the capacitor (C2) will still contribute voltage even if there is no current flowing through their branch cause of the Fully charged Capacitor C2

Sure, voltage source always has a fixed potential difference. What's the potential difference across a resistor with zero current flowing?

 

[Tomi Kolawole]

0 FOR THE RESISTOR since i is 0 but the battery itself still has a voltage? right?

 

[gneill]

0 FOR THE RESISTOR since i is 0 but the battery itself still has a voltage? right?

Right. So you should be able to write KVL for the loop with the only unknown potential difference being that of the capacitor.

 

[cnh1995]

0 FOR THE RESISTOR since i is 0 but the battery itself still has a voltage? right?

Yes.

Since you've correctly said that the current through the capacitors is zero, just remove them from the circuit and keep the respective terminals open. How does the current flow in this new circuit?

 

[Tomi Kolawole]

thank you so much kind sir!