ampere-turn: meaning, definition, pronunciation and examples
C2Technical/Scientific
Quick answer
What does “ampere-turn” mean?
A unit of magnetomotive force in the International System of Units, defined as the force produced by one ampere of current flowing through one turn of a coil in a vacuum.
Audio
Pronunciation
Definition
Meaning and Definition
A unit of magnetomotive force in the International System of Units, defined as the force produced by one ampere of current flowing through one turn of a coil in a vacuum.
In electromagnetism, the ampere-turn is used to quantify the magnetic potential created by an electric current in a coil, serving as a fundamental measure for designing electromagnets, transformers, and inductors. It directly relates current and number of coil turns to magnetic field strength.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage. Both follow SI unit conventions. Spelling remains identical.
Connotations
None beyond the technical definition in either variety.
Frequency
Equally rare outside electrical engineering and physics contexts in both regions.
Grammar
How to Use “ampere-turn” in a Sentence
[Number] ampere-turn(s)ampere-turn(s) of [magnetomotive force]requires/needs [X] ampere-turnsVocabulary
Collocations
Examples
Examples of “ampere-turn” in a Sentence
verb
British English
- (Not used as a verb)
American English
- (Not used as a verb)
adverb
British English
- (Not used as an adverb)
American English
- (Not used as an adverb)
adjective
British English
- The ampere-turn rating is critical for the solenoid's performance.
- Refer to the ampere-turn specification in the datasheet.
American English
- The design requires an ampere-turn calculation for each coil.
- Check the ampere-turn capacity of the core material.
Usage
Meaning in Context
Business
Extremely rare, possibly in procurement specifications for electromagnetic components.
Academic
Common in electrical engineering, physics, and materials science textbooks and research papers dealing with electromagnetism.
Everyday
Virtually never used.
Technical
The primary context. Used in design sheets, specifications, and calculations for electromagnets, motors, relays, transformers, and inductors.
Vocabulary
Synonyms of “ampere-turn”
Strong
Neutral
Vocabulary
Antonyms of “ampere-turn”
Watch out
Common Mistakes When Using “ampere-turn”
- Omitting the hyphen ('ampere turn').
- Using it as a verb (e.g., 'to ampere-turn the coil').
- Confusing it with 'ampere' alone, which is just current.
- Pronouncing 'ampere' as /æmˈpɪər/ instead of /ˈæmpɪr/ or /ˈæmpɛː/.
FAQ
Frequently Asked Questions
No. An 'ampere' is the unit of electric current. An 'ampere-turn' is the product of current (amperes) and the number of turns in a coil, and is the unit of magnetomotive force.
Yes, it is a continuous unit. You can have, for example, 2.5 ampere-turns if 0.5 amperes flows through 5 turns.
Almost never. It is a specialized term confined to electrical engineering, physics, and related technical fields.
It is hyphenated to show that the two words function as a single compound noun, specifically naming a unit of measurement, similar to 'light-year' or 'man-hour'.
A unit of magnetomotive force in the International System of Units, defined as the force produced by one ampere of current flowing through one turn of a coil in a vacuum.
Ampere-turn is usually technical/scientific in register.
Ampere-turn: in British English it is pronounced /ˈæmpɛː tɜːn/, and in American English it is pronounced /ˈæmpɪr tɜrn/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “(No idioms – highly technical term)”
Learning
Memory Aids
Mnemonic
Think: **AMP**ere (current) makes a **TURN** (loop) to create magnetic force.
Conceptual Metaphor
MAGNETIC FORCE IS A PRODUCT OF FLOW AND PATH. (The 'turn' conceptualizes the path of the current, and its multiplication with current 'amperes' yields the force.)
Practice
Quiz
What does 'ampere-turn' specifically quantify?