Answer:
It is used to transform voltage.
Step-by-step explanation:
Transformers are the electronic device used to convert alternating current from one voltage to another. There are two types of transformer such as step up transformer and step down transformer. Transformer are used for increasing low AC voltages at high current which is called step-up transformer while on the other hand, decreasing high AC voltages at low current known as a step-down transformer in electric power applications. Step-up transformers are used to increase the voltage and step-down transformers are used to reduce the voltage levels.