Finding currents and terminal voltage in a three-loop circuit with 6V and 12V batteries

[knobles8179]

Homework Statement

http://session.masteringphysics.com/problemAsset/1084694/3/GIANCOLI.ch26.p36.jpg

Determine the currents I_1, I_2, and I_3 in the figure. Assume the internal resistance of each battery is 1.0 Ohm.
I1, I2, I3 = __________ A



What is the terminal voltage of the 6.0-V battery?
Vt = _____ V

Homework Equations

I know I have to include Kirchoff's Loop Rule and Junction Rule

 

[tiny-tim]

Welcome to PF!

Hi knobles8179! Welcome to PF!

(btw, two h's in Kirchhoff! )

That's right … do loop equations for any two of the three loops, and a junction equation, and find the voltage drop across the "r" resistance (which i assume is intended to represent the internal resistance of the 6V battery), and subtract it from the 6V.