Q12 Single choice Mark for later What is a fundamental purpose of a step-up or step-down transformer? A Supply a neutral reference on the secondary side that is different than what is supplied on the primary side. B Supply a ground reference on the secondary side that is different than what is supplied to the primary side. C Deliver a voltage reference on the secondary side of the transformer different than what is supplied to the primary side. D Deliver the same voltage reference on the secondary side of the transformer equal to that supplied on the primary side. Correct answer