- #1
JP4Fun
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Homework Statement
Question: Find the current in the circuit shown.
http://i1307.photobucket.com/albums/s599/JustOn4Fun/PhysicsFigure_zps39d4c66d.png
Homework Equations
Not sure if equations are necessary since it's a question testing the use of the following rules:
Junction Rule
The Loop Rule
The Attempt at a Solution
At Junction A: I1-I2-I3=0
At Junction B:-I1+I2+I3=0
Loop 1:15V-I3R-I1R=0
Loop 2:-9V-I2R+I3R=0
I1=I2+I3
15V-100I3-100I1=0
15/100=I3+I1=.15
-9V-100I2+I3=0
I3-I2=9/100=.09
(I3+I1)-(I3-I2)=.06
I1+I2=.06
I think I'm having a brain fart or something because it feels like I'm just messing with the problem but not seeing something that's right under my nose. Thank you for the help!