rectify
REK-tuh-fy
/ˈrektɪfaɪ/
To convert alternating current (AC) into direct current (DC).
In electrical engineering, rectify has a precise mathematical meaning: converting a bidirectional wave into a unidirectional one. In general English, it means 'to correct or set right.'
The story behind the word. From the Latin rectus (straight or right) and the suffix -ficare (to make). Literally, it means 'to make straight.' In electrical terms, it refers to taking a wavy, alternating current wave and 'straightening' it out into a flat, direct current line.
Word relationships
- convert: Convert is a broad term for changing any state or form, whereas rectify is the specific electrical term for converting AC to DC.
- invert: In electrical engineering, to invert is to convert direct current (DC) into alternating current (AC).
Commonly confused with
- transform: To transform is to change the voltage level of AC power, whereas to rectify is to change the nature of the current from AC to DC.
Word family
- rectifier (noun): An electrical device that converts alternating current to direct current.
- rectification (noun): The process of converting alternating current to direct current.
Collocations
- rectify current
- rectify AC
- rectifying diode
- fully rectify
Example sentences
- "The power adapter must rectify the alternating current from the wall outlet into the direct current required by the laptop." Explaining how laptop power bricks work.
- "The device is designed to rectify high-frequency oscillations into a continuous current capable of operating a receiver." A historical patent application for early radio technology.
Memory hook
Think of 'correcting' a crooked line to make it 'rectified' and straight, like turning wavy AC into straight DC. Rectify makes the wavy current straight.
When not to use
Do not use 'rectify' when you mean simply 'changing' voltage levels (which is done by a transformer).
Fun facts
- Early rectifiers used jars of chemical mush or pools of liquid mercury (mercury-arc rectifiers) that glowed with an eerie blue light while converting power.
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