alternating voltage: meaning, definition, pronunciation and examples
C1Technical/Formal
Quick answer
What does “alternating voltage” mean?
An electric voltage that periodically reverses direction, typically following a sinusoidal waveform.
Audio
Pronunciation
Definition
Meaning and Definition
An electric voltage that periodically reverses direction, typically following a sinusoidal waveform.
The standard form of electrical power supplied to homes and businesses, characterized by a continuous change in polarity and magnitude over time, as opposed to direct voltage which flows in one direction.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences. Spelling conventions follow standard UK/US patterns (e.g., 'metre' vs. 'meter' in related contexts, but 'voltage' is spelled identically).
Connotations
Identical technical connotations in both varieties.
Frequency
Equal frequency in technical contexts in both regions.
Grammar
How to Use “alternating voltage” in a Sentence
The [device] requires an alternating voltage of [value].An alternating voltage is applied across the [component].Vocabulary
Collocations
Examples
Examples of “alternating voltage” in a Sentence
verb
British English
- The circuit is designed to alternate the voltage at 50 Hz.
- The generator alternates the voltage efficiently.
American English
- The inverter alternates the voltage from the battery.
- This device can alternate voltage at high frequencies.
adverb
British English
- [Not standard usage; 'alternating' is not typically used as an adverb for 'voltage']
American English
- [Not standard usage; 'alternating' is not typically used as an adverb for 'voltage']
adjective
British English
- The alternating-voltage supply is stable.
- We need an alternating-voltage source for this test.
American English
- Check the alternating-voltage waveform on the oscilloscope.
- The alternating-voltage signal was distorted.
Usage
Meaning in Context
Business
Rare, except in contexts of electrical supply, utilities, or manufacturing specifications.
Academic
Common in physics, engineering textbooks, and research papers on electrical circuits and power systems.
Everyday
Very rare; laypeople typically refer to 'mains electricity' or 'AC power'.
Technical
The primary context. Used precisely to specify the type of electrical signal or supply in design, analysis, and measurement.
Vocabulary
Synonyms of “alternating voltage”
Strong
Neutral
Weak
Vocabulary
Antonyms of “alternating voltage”
Watch out
Common Mistakes When Using “alternating voltage”
- Using 'alternative voltage' (which would imply a choice between options).
- Confusing it with 'alternate voltage' (which could imply a secondary or backup voltage).
- Incorrectly using it as a verb (e.g., 'The current alternates voltage').
FAQ
Frequently Asked Questions
It refers to the frequency, or how many times per second the voltage completes a full cycle of reversal (e.g., 50 Hz in the UK, 60 Hz in the US).
In nearly all contexts, yes. 'Mains voltage' is the everyday term for the alternating voltage supplied to buildings by the power grid.
Primarily because alternating voltage can be easily transformed to higher or lower voltages using transformers, allowing for efficient long-distance transmission at high voltages (reducing losses) and safe local distribution at lower voltages.
Yes, in a technical sense. 'Constant' here typically means the amplitude (peak voltage) and frequency do not change over time, even though the instantaneous voltage and direction are constantly alternating.
An electric voltage that periodically reverses direction, typically following a sinusoidal waveform.
Alternating voltage is usually technical/formal in register.
Alternating voltage: in British English it is pronounced /ˈɔːltəneɪtɪŋ ˈvəʊltɪdʒ/, and in American English it is pronounced /ˈɔːltərneɪtɪŋ ˈvoʊltɪdʒ/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “[No common idioms for this technical term]”
Learning
Memory Aids
Mnemonic
Think of 'ALTERNATING' as a traffic light that constantly changes between red and green (direction of flow), while 'VOLTAGE' is the pressure pushing the electrical cars.
Conceptual Metaphor
ELECTRICITY IS A FLUID THAT MOVES BACK AND FORTH.
Practice
Quiz
What is the primary characteristic that distinguishes alternating voltage from direct voltage?