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For the loop shown, which equation matches the Kirchhoff's Voltage Law expression given in the notes? 
A$V_1+V_2+V_3+V_4+V_5+V_6+V_7=V_s$
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 note shows the loop equation as the sum of the listed voltage drops together with the source term taken with opposite sign: $V_1+V_2+V_3+V_4+V_5+V_6+V_7-V_s=0$. This is the KVL statement for that chosen traversal direction.
