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Kirchhoff's Voltage Law for a closed loop states that the algebraic sum of all potential differences around the loop is:
AEqual to the current in the loop
BZero
CEqual to the resistance in the loop
DAlways positive
Answer & Solution
Correct answer: B. Zero
Kirchhoff's Voltage Law is based on conservation of energy: when you complete a closed loop, the net change in electric potential must be zero.