A transformer is a device used to
A) increase or decrease an ac voltage.
B) transform a direct current into an alternating current.
C) increase or decrease a dc voltage.
D) transform an alternating current into a direct current.

Question

Quizplus · Accepted Answer

Transformers are used to increase (step up) or decrease (step down) alternating current (AC) voltages; they cannot directly alter direct current (DC) voltages or convert AC to DC or vice versa.

A Transformer Is a Device Used to