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In the loop shown, which expression represents 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$V_1+V_2+V_3+V_4+V_5+V_6+V_7-V_s=0$
C$V_s-(V_1+V_2+V_3+V_4+V_5+V_6+V_7)=0$
D$V_1+V_2+V_3=V_4+V_5+V_6+V_7$
Answer & Solution
Correct answer: B. $V_1+V_2+V_3+V_4+V_5+V_6+V_7-V_s=0$
The figure and printed equation show the loop relation as $V_1+V_2+V_3+V_4+V_5+V_6+V_7-V_s=0$. This means the sum of drops across the elements equals the source voltage.