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The terms "step-up" and "step-down," when used with transformers, always apply to

A. power
B. current
C. voltage
D. resistance


Sagot :

Final answer:

Step-up transformers increase voltage and decrease current, step-down transformers do the opposite.


Explanation:

A step-up transformer increases voltage and decreases current, while a step-down transformer decreases voltage and increases current. The ratio of the number of loops in the coils determines the output voltage, which can be greater than, less than, or equal to the input voltage. Transformers have high efficiency, typically over 99%.


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