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I have the following circuit:

schematic

simulate this circuit – Schematic created using CircuitLab

If I choose clockwise current direction then KVL gives me: $$10\text{V}+5\text{k}\Omega \times I-0.7=0 \rightarrow I=-1.86\text{mA}$$ If I choose counter clockwise current direction KVL gives me: $$-10\text{V}+5\text{k}\Omega \times I+0.7=0 \rightarrow I=+1.86\text{mA}$$

I want to ask if I am doing something wrong or the negative current in the first case is because the assumed current direction is backwards to the actual flow?

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  • \$\begingroup\$ Yes. A negative just indicates assumed direction is incorrect. \$\endgroup\$ Commented Jun 2, 2015 at 11:58

2 Answers 2

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Nope, you're absolutely correct in both cases. A negative magnitude of a vector is the same as a positive magnitude on the vector in the opposite direction.

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What you have done is perfectly correct , to have a better clarification check the image below

enter image description here

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