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Homework Statement
This circuit is given:[/B]
What are the values of ε_{1} and ε_{3}?
Homework Equations
IR=V
The Attempt at a Solution
I get the right answer for ε_{1} (3V).
But I get that ε_{3}=12V and not 15 (the answer in the textbook).
First the charge from a to b is 3A.
Then I simply use Kirchhoff's second law, which gives: 2I_{ab}6+10+2ε_{3}=0.
That gives ε_{3}=12.
Am I wrong or the book? Maybe the charge from a to b is not 3A?
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