Definition

Noun (Physics): 1. A measure of the strength of a magnetic, electric, or other field: Specifically, it is the number of changes in energy flow (or the amount of a physical quantity, like magnetic force) passing perpendicularly through a given surface per unit area. It quantifies how concentrated the field lines are.

Usage

• Flux density is a precise term used to describe the intensity of a field at a specific point.
• It is a critical parameter in electromagnetism and materials science.
• Common types include magnetic flux density (measured in teslas) and electric flux density (measured in coulombs per square meter).

Examples

• The flux density of the magnet was measured to be 1.5 tesla.
• Engineers calculated the flux density to ensure the motor would operate efficiently.
• A high flux density in the core indicates a strong magnetic field.

Advanced Usage

• "To measure flux density": To determine the strength of a field at a point.
  • Scientists used a gaussmeter to measure the magnetic flux density.
• "Flux density vector": Refers to the fact that flux density has both magnitude and direction.
  • The direction of the flux density vector is tangent to the field line.

Variants and Related Words

• Magnetic flux density (B-field): The strength of a magnetic field. Its SI unit is the tesla (T).
• Electric flux density (D-field): A vector field related to electric charge distribution. Its SI unit is coulomb per square meter (C/m²).
• Luminous flux density: Illuminance, the amount of luminous flux per unit area.
• Radiant flux density: Irradiance, the power of electromagnetic radiation per unit area.

Synonyms

• Field strength
• Magnetic induction (specifically for magnetic flux density)

Related Phrases

• Flux density measurement: The act or process of determining flux density.
  • Accurate flux density measurement is essential for designing transformers.
• Saturation flux density: The maximum flux density a material can support.
  • The core material reached its saturation flux density.

Noun

1. (physics) the number of changes in energy flow across a given surface per unit area