Question

38. Transformers are used to
(A) step up or step down AC voltage
(B) convert AC to DC
(C) step up DC voltage
(D) convert DC to AC​

Answer 1

Explanation:

Transformers are most commonly used for increasing low AC voltages at high current (a step-up transformer) or decreasing high AC voltages at low current (a step-down transformer) in electric power applications, and for coupling the stages of signal-processing circuits.