A transformer that has one winding, which is used for both the primary and secondary, is called a(n) _____.

A) distribution transformer
B) step-up transformer
C) autotransformer
D) control transformer

Autotransformer

A type of electrical transformer with a single winding that acts as both the primary and the secondary winding, used for varying the level of voltage.

Primary

The initial or most important in order of development or consideration.

Distribution Transformer

A transformer used in electrical power distribution to step down voltage levels from high to lower levels for consumer use.