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When traversing a closed loop and applying Kirchhoff's Voltage Law, a potential rise across a source should be taken with
Azero sign because sources are ignored
Ba sign opposite to a potential drop in the chosen traversal
Cthe same sign as every resistor regardless of polarity
Da negative sign only if the loop contains more than one resistor
Answer & Solution
Correct answer: B. a sign opposite to a potential drop in the chosen traversal
In KVL, the sign depends on how you cross the element relative to its polarity. Crossing from $-$ to $+$ is a potential rise, which is taken with sign opposite to a drop from $+$ to $-$. The sign is determined by traversal and polarity, not by the type of element alone.