magnetic field strength

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magnetic field strength

A student measures the magnetic field strength around a bar magnet.

Definition
  1. Noun (Physics):
    • A vector quantity describing the force that a magnetic field exerts on a moving electric charge: It is a measure of the intensity of a magnetic field at a specific point, independent of the magnetic properties of the surrounding material.
    • The magnitude of the magnetic field vector H: In technical contexts, it specifically refers to the magnetic field strength H, as opposed to the magnetic flux density B.
Usage and Examples
  • Noun:
    • The magnetic field strength inside the solenoid was calculated to be 500 amperes per meter.
    • Scientists measured the magnetic field strength generated by the experimental coil.
    • A higher magnetic field strength is required to align the magnetic domains in the material.
Advanced Usage and Technical Notes
  • Distinction from Magnetic Flux Density (B): In electromagnetism, magnetic field strength (H) and magnetic flux density (B) are related but distinct concepts. H is measured in amperes per meter (A/m) and describes the field from free currents. B, measured in teslas (T), includes the magnetization of the material and is often what is sensed as "magnetic force."
  • In Materials: Inside a material, the relationship is B = μ₀(H + M), where μ₀ is the permeability of free space and M is the magnetization of the material.
  • "Strength of the magnetic field": A common descriptive phrase equivalent to "magnetic field strength."
    • The strength of the magnetic field diminishes with distance from the magnet.
Variants and Related Words
  • Magnetic field intensity: A direct synonym for magnetic field strength.
  • Magnetizing field: Another term used, emphasizing its role in magnetizing materials.
  • H-field: The standard symbol and shorthand used in physics and engineering equations.
  • Magnetic flux density (B): The related quantity representing the total magnetic field, including the material's response.
Synonyms
  • Magnetic field intensity
  • Magnetizing force
  • H-field
Common Phrases and Contexts
  • "To measure magnetic field strength": A standard phrase in experimental physics and engineering.
    • They used a Hall effect sensor to measure the magnetic field strength.
  • "Uniform magnetic field strength": Describes a field where H is constant in magnitude and direction.
    • The experiment requires a region of uniform magnetic field strength.
magnetic field strength

A student measures the magnetic field strength around a bar magnet.

Noun
  1. the amount of magnetic flux in a unit area perpendicular to the direction of magnetic flow

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