Finding terminal voltage given two batteries

[taylorivy]

Homework Statement

http://www.webassign.net/giancoli5/19_31alt.gif
I was given this circuit and told that R=6.6Ω. Based on the information, I was asked to find the terminal voltage.

Homework Equations

Terminal V=Emf-ir
Kirchoff's laws

The Attempt at a Solution

I used Kirchoff's laws to find i=.61 A. From there, I don't understand how to find terminal voltage without knowing internal resistance. I feel like I wasn't taught an equation or something.

 

[gneill]

Homework Statement

http://www.webassign.net/giancoli5/19_31alt.gif
I was given this circuit and told that R=6.6Ω. Based on the information, I was asked to find the terminal voltage.

Homework Equations

Terminal V=Emf-ir
Kirchoff's laws

The Attempt at a Solution

I used Kirchoff's laws to find i=.61 A. From there, I don't understand how to find terminal voltage without knowing internal resistance. I feel like I wasn't taught an equation or something.

It looks like your circuit shows two batteries each with an internal resistance. So what "terminal voltage" is being referred to?

 

[taylorivy]

Man, I realized that as soon as I looked at the diagram again. I factored in the two given resistances as the internal ones and it worked out perfectly. Thanks anyway!