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In the loop shown in the figure, which expression matches Kirchhoff's Voltage Law as printed in the notes? 
A$V_1+V_2+V_3+V_4+V_5+V_6+V_7-V_s=0$
B$V_s+V_1+V_2+V_3+V_4+V_5+V_6+V_7=0$
C$V_1+V_2+V_3-V_4-V_5-V_6-V_7=0$
D$V_s=0$
Answer & Solution
Correct answer: A. $V_1+V_2+V_3+V_4+V_5+V_6+V_7-V_s=0$
The figure and printed relation indicate that the source rise balances the sum of the potential drops across the elements. Therefore the loop equation is $V_1+V_2+V_3+V_4+V_5+V_6+V_7-V_s=0$.
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