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.

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