10-19-2012, 03:55 PM
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#7
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Join Date: Jul 2008
Location: Malaysia
Age: 33
Posts: 1,679
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Re: Circuits Problem(s)
Its preference. You can make all currents leave V1, or all currents enter V1. If you do the algebra, you will get back the same thing. You can even have I1 and I2 flow in and I3 leaving; which means I1+I2=I3. Just be careful with the direction of the arrows and the positive/negative signs
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