Why Is My Calculated Current Through R1 Incorrect According to Kirchhoff's Laws?

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SUMMARY

The discussion centers on the calculation of current through resistor R1 in a circuit governed by Kirchhoff's Laws. The circuit includes a 6V battery and various resistors and capacitors, with specific values provided for each component. The calculated equivalent resistance (Req) is 485400 ohms, leading to a total current of 1.23 x 10^-5 A. The participants confirm the correctness of the equivalent resistance but question the method used to derive the total current.

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Okay, I've been trying to study for my physics final and I've been stuck on this one for a few hours now...it's driving me crazy. There must be a flaw in my understanding of Kirchhoff's Laws.
A link to the circuit can be found here -> http://img410.imageshack.us/img410/7798/resist.jpg

Homework Statement



The battery voltage is 6 V.
C1 = 1.8000000000000002 * 10^-8 F C2 = 1.5000000000000002 * 10^-8 F
C3 = 1.1000000000000001 * 10^-8 F
R1 = 270000.0 ohms R2 = 560000.0 ohms R3 = 110000.0 ohms
R4 = 120000.0 ohms R5 = 390000.0 ohms R6 = 180000.0 ohms
R7 = 680000.0 ohms
What is the current through R1?


2. The attempt at a solution

R12 = 830000 ohms
R123 =97127 ohms
R67 = 860000 ohms
R567 =268320 ohms
Req= 485400 ohms
Total current = 1.23 x 10-5
 
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Welcome to PF!

Hi uselessprog! Welcome to PF! :wink:
uselessprog said:
Req= 485400 ohms
Total current = 1.23 x 10-5

485400 Ω looks right :smile:

but how did you get 1.23 x 10-5?
 

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