Calculate the current i3 in the following configuration

AI Thread Summary
The discussion focuses on calculating the current i3 in a circuit with two batteries and resistors. The provided values include EMF_1 at 6 V, EMF_2 at 3 V, R_1 at 70 Ohm, and R_3 at 20 Ohm. The user initially struggles with applying the formula V=IR due to the presence of two batteries. However, they later indicate that they have resolved the issue and found the solution. The conversation highlights the challenges of circuit analysis involving multiple power sources.
shimizua
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Homework Statement


Calculate the current i3 in the following configuration:


http://capa-new.colorado.edu/msuphysicslib/Graphics/Gtype57/prob06_kirch.gif
EMF_1 = 6 V
EMF_2 = 3 V
R_1 = 70 Ohm
R_3 = 20 Ohm

Homework Equations


I know that V=IR so I=V/R
but because there are 2 batteries i am just having a little bit of a problem.


The Attempt at a Solution


tried adding up the batteries but it does not seem to be working
 
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nm, i figured it out
 
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