Multiple choice

The instrument used to convert AC current into DC current is

  1. motor

  2. oscillator

  3. rectifier

  4. transformer

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

A rectifier converts alternating current (AC) to direct current (DC) by allowing current flow in only one direction. This is essential for powering DC devices from AC mains and is found in all power supplies and battery chargers.