Which of the following statements describes the difference between the primary windings and the secondary windings of a 2:1 step-down voltage transformer?

Correct Answer: Option D — The secondary windings have half as many turns as the primary windings.

Voltage ratios in transformers are directly proportional to turns ratios per IEEE 45 guidelines. A 2:1 step-down transformer requires the secondary windings to possess exactly half as many turns as the primary windings.