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## Homework Statement

Use Kirchoff's rules to determine I1, I2 and I3 for the following circuit: https://chip.physics.purdue.edu/protected/Prelab221img/e4pp2.jpg

E1 = emf = 9 V

r = internal resistance = 1.5 ohms

R1 = 5 ohms

R2 = 15 ohms

R3 = 22.75 ohms

Find I1, I2, I3

## Homework Equations

V=IR

I(R1+R2) = V and Req = R1 + R2+ ... for resistors in series

I = emf/R1 + emf/R2 + ... and 1/Req = 1/R1 + 1/R2 + ... for resistors in parallel

Krichoff's junction rule Iin-Iout = 0

## The Attempt at a Solution

I found I1 to be .741 A by using I=V/R with R being the calculated total resistance: (1.5 + 1/(1/22.75+ 1/20) = 12.14

Now I've been using various combinations of the equations above to get the other two I's but I can't seem to get a correct answer, can someone point me in the right direction?

Thanks in advance