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What does Kirchhoff's Voltage Law state for a closed loop in a circuit?
AThe current is constant everywhere in the loop.
BThe sum of all resistances in the loop is zero.
CThe algebraic sum of all potential rises and drops around the loop is zero.
DThe voltage across each element is the same.
Answer & Solution
Correct answer: C. The algebraic sum of all potential rises and drops around the loop is zero.
Kirchhoff's Voltage Law expresses conservation of energy in a loop: as you move around a closed path, the total potential rises and drops must cancel, giving an algebraic sum of zero.