Use the noun transformer when you're talking about a device that conducts electricity and controls the voltage that can travel between one circuit and another.
One who, or that which, transforms. Specif.
Noun
an electrical device by which alternating current of one voltage is changed to another voltage
n.
One who, or that which, transforms. Specif. (Elec.),
an apparatus for producing from a given electrical current another
current of different voltage.
Transformer
One who, or that which, transforms. Specif.
Usage Examples
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