alternating current
Pronunciation
Noun
B2 Upper-intermediate
Quick answer
An electric current that regularly reverses direction, unlike current that flows one way only.
Synonyms and antonyms
Antonyms
Usage notes
It's used for mains electricity because it can be transformed to different voltages far more easily than direct current.
Test yourself
Which word fits the gap? "The mains electricity supplying most homes is _____."
Answer: alternating current
In your own words, what does "alternating current" mean?
An electric current that regularly reverses direction, unlike current that flows one way only.
Learn next at B2
- altruism Unselfish concern for the wellbeing of others.
- ambiguous Having more than one possible meaning, so it isn't clear which one is...
- ambitious Having a strong desire to achieve success, power, or a difficult goal.
- ambivalent Having mixed or contradictory feelings about something.
- amino acid A small molecule that joins with others to form proteins.
- amplifier A device that increases the strength of an electrical signal, especial...