Multiple choice

A device used for converting a.c. into d.c. is called:

  1. transformer

  2. rectifier

  3. motor

  4. dynamo
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A rectifier is an electrical device that converts alternating current (AC) to direct current (DC). It uses diodes or other semiconductor components to allow current flow in only one direction. A transformer changes voltage levels but maintains AC, a motor converts electrical energy to mechanical energy, and a dynamo generates DC power mechanically but isn't primarily a conversion device from AC to DC.

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