ampere-turn

/'æmpeə,tə:n/
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ampere-turn

An engineer calculates the ampere-turn value for an electromagnet coil.

Definition
  1. Noun:
    • A unit of magnetomotive force: An ampere-turn is a standard unit used to measure magnetomotive force (MMF). It is defined as the magnetomotive force produced when an electric current of one ampere flows through a single complete turn (loop) of a coil in an electrical circuit.
Usage
  • The is a fundamental unit in electromagnetism for quantifying the magnetic potential that drives magnetic flux in a magnetic circuit.
  • It is calculated by multiplying the electric current in amperes by the number of turns in the coil.
  • Example: "The solenoid requires 500 to generate the necessary magnetic field strength."
Advanced Usage
  • Technical Context: In engineering design, the required for an electromagnet are calculated based on the desired magnetic flux and the reluctance of the magnetic path.
    • Example: "The design specification calls for 1200 ampere-turns to overcome the core's reluctance."
  • Comparative Measurement: The is directly related to the gilbert, another unit of magnetomotive force, with 1 being approximately equal to 1.257 gilberts.
    • Example: "To convert the measurement, recall that 10 ampere-turns is equivalent to about 12.57 gilberts."
Variants and Related Words
  • Magnetomotive force (MMF) (n): The physical quantity that measures; the magnetic analog of electromotive force (EMF) in an electrical circuit.
  • Gilbert (n): A CGS (centimeter-gram-second) unit of magnetomotive force; 1 gilbert is approximately 0.7958 .
Synonyms
  • MMF unit: A general term for a unit of magnetomotive force, with being a specific SI (International System of Units) example.
  • (No direct common-language synonym): This is a precise technical term without an everyday synonym.
Related Phrases (Compound Terms)
  • Ampere-turn per meter (At/m): The derived SI unit for magnetic field strength (H), calculated as divided by the length of the magnetic path.
    • Example: "The magnetic field strength was measured at 100 ampere-turns per meter."
Related Idioms
  • (None): is a specific scientific and engineering term and is not used in idiomatic expressions.
ampere-turn

An engineer calculates the ampere-turn value for an electromagnet coil.

Noun
  1. a unit of magnetomotive force equal to the magnetomotive force produced by the passage of 1 ampere through 1 complete turn of a coil; equal to 1.257 gilberts