Question

fill in the blank question
a device used to step up or step down the ac voltage in a circuit is called a(n)
need help? review these concept resources.
read about the concept

Explanation:

A transformer is an electrical device that uses electromagnetic induction to change the voltage level of an alternating - current (AC) electrical power supply. It can either increase (step - up) or decrease (step - down) the voltage.

Answer:

transformer