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Homework Statement
The value displayed on the ampetmeter is 2A.
The value displayed on the voltmeter is 5V
Find the unknown ε and R
Homework Equations
The Attempt at a Solution
I have the correct equations, I am sure of it. However on of them is:
2*2+2*10εRI_{1}=0
How do I know if RI_{1} (I_{1} is the current on the "branch" with the unknown R) is 5 or 5? The correct answer is 5, because the answer is 29. How do I know this? Why can't it be 5?
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