The value displayed on the ampetmeter is 2A.
The value displayed on the voltmeter is 5V
Find the unknown ε and R
The Attempt at a Solution
I have the correct equations, I am sure of it. However on of them is:
How do I know if RI1 (I1 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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