A transformer would never be selected to:
A) step-up or step-down power
B) isolate stages
C) step-up or step-down voltage
D) match impedances

Question

Quizplus · Accepted Answer

Transformers are primarily used to step-up or step-down voltage levels, not power. The power level (in watts) of a system is determined by the product of voltage and current. Transformers can change the voltage and current levels, but the power transferred from the primary to the secondary side (minus losses) remains the same. Therefore, they are not used to step-up or step-down power directly.

A Transformer Would Never Be Selected To