Which one of the following devices changes low voltage alternating current to high voltage alternating current and vice versa?

  1. Generator
  2. Motor
  3. Transformer
  4. Vibrator

Answer

A transformer is an electrical device that transfers electrical energy between two or more circuits through electromagnetic induction. A varying current in one coil of the transformer produces a varying magnetic field, which in turn induces a voltage in a second coil.

The correct option is C.

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