West Virginia Barber Written Practice Exam

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What function does a rectifier perform in an electrical circuit?

  1. Amplifies DC voltage

  2. Changes AC to DC

  3. Converts AC voltage levels

  4. Changes DC to AC

The correct answer is: Amplifies DC voltage

A rectifier is a device that converts alternating current (AC) to direct current (DC) in an electrical circuit. It does not amplify DC voltage, change AC voltage levels, or change DC to AC. Therefore, the correct answer is that a rectifier changes AC to DC.

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