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Jalisi

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## Homework Statement

Calculate the total resistance of the circuit.

Calculate the potential difference across each of the resistors.

http://img849.imageshack.us/img849/2190/hw1v.jpg

## Homework Equations

Series resistors= R

_{T}=R1+R2+R3

Parallel resistors = 1/R

_{T}=1/R

_{1}+1/R

_{2}+1/R

_{3}

V=iR or i=V/R

V=voltage i=current R=Resistance

## The Attempt at a Solution

I'm trying to find the "groups" in the circuit so I can calculate the smaller parts them combine into a whole.

I started by calculating R5 and R6, which are parallel. 1/600+1/200=4/600=600/4=150Ω

My problem starts here. I'm not quite sure which resistors are in parallel and which are in series. I calculated R2, R4, and R7 as being parallel. Thus 1/500+1/1000+1/2000=7/2000=2000/7= 285.7Ω

Now that I have the parallel groups solved, I can look at the resistors in series so: 200Ω+ 150Ω +285.7Ω + 100Ω = 735Ω

Would that be correct for the total resistance?

If so, then to find the total current, use i=V/R so i=25v/735Ω = 0.034A

And from there I have total voltage, current, and resistance so it should be fairly easy to calculate each potential difference.

Thanks so much for any help provided.

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