Loop 1
Loop 2
My question is relation to (I1+I2) why is it positive or negative in each equation.
I am unable to find a good way to consistently know whether it is it a negative -R(I1+I2) or a positive +R(I1+I2)
I also find it hard to label the polarity of the resistors any help would be great I have taken the pictures from. http://www.allaboutcircuits.com/vol_1/chpt_10/3.html
I am still not able to understand completely.
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