Question Detail
Question
In an RLC circuit, which of the following is always used as a vector reference?
Correct Answer
Option D is the correct answer.
Detailed Explanation
In series RLC circuits, current is the same through all elements, so it's conventionally taken as the reference phasor (at 0°) when constructing voltage phasor diagrams.
Hint
In a series circuit, one quantity is common to every element and is naturally used as the reference for phasor diagrams.