Explanation:

Transformers use induction to transform voltages from one value to another. turns. A step-up transformer increases voltage and decreases current, whereas a step-down transformer decreases voltage and increases current.

A transformer that increases the voltage from primary to secondary (more secondary winding turns than primary winding turns) is called a step-up transformer.

Conversely, a transformer designed to do just the opposite is called a step-down transformer.