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  • Electrology Licensing Exam
  • What do you call a device that is used to change the volt...
Multiple choice

What do you call a device that is used to change the voltage of a current?

  1. oscillator

  2. transformer

  3. rectifier

  4. capacitor

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A transformer is a device that increases or decreases the voltage of an alternating current.

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