O que's o difference entre H e B fields?

H (A/m) é o applied magnetic field strength—o que you create com currents ou magnets. B (tesla) é o resulting flux density including o material's response. In materials com high permeability like iron, B can be thousands of times larger than μ₀H would predict.

Por que do magnet specs use oersteds?

Oersted é a convenient scale for permanent magnet characterization. Coercivity (resistance to demagnetization) typically ranges from hundreds to thousands of oersteds—nice round numbers. O CGS sistema é também traditional in magnetism research.

Como do I calculate H in a solenoid?

For a long solenoid: H = nI, onde n é turns per meter e I é current in amperes. H é in A/m. O resulting B = μ₀μᵣnI depends on o que's inside o solenoid (air: μᵣ = 1, iron core: μᵣ ~ 1000-5000).

Intensidade do Campo Magnético Converter

Sobre Magnético Campo Intensidade Conversão

Magnético field strength (H-field) measures o magnetizing force esse creates magnetic flux in a material. It's distinct from magnetic flux density (B-field)—H represents o applied field from currents e external sources, while B includes o material's magnetic response. Este distinction é crucial: o mesmo H-field produces vastly diferente B-fields in air versus iron due to iron's high permeability. H é o independent variable you control; B é o resulting field including o material's contribution.

O SI unidade é amperes per meter (A/m), representing magnetomotive force per unidade length. O older CGS unidade oersted (Oe) é ainda amplamente utilizado for permanent magnet specifications, coercivity ratings, e magnetic recording media. O B-H curve (hysteresis loop) esse characterizes magnetic materials plots B versus H. Understanding H é essential for magnetic circuit design, material characterization e selection, electromagnet coil design, e demagnetization analysis.

Our converter handles todos padrão magnetic field strength unidades usado in electromagnetic engenharia.

Comuns Magnético Campo Intensidade Conversions

De	Para	Multiplicar Por
A/m	Oe (oersted)	0.01257 (4π/1000)
Oe	A/m	79.577 (1000/4π)
A/m	kA/m	0.001
kA/m	A/m	1,000
A/m	Gb/cm	0.01257
A/m	A/cm	0.01
Oe	Gb/cm	1 (equivalent)
A/cm	A/m	100
A/m	A/cm	0.01

Magnético Campo Intensidade Referência de Unidades

Ampere per meter (A/m) – O SI unidade of magnetic field strength, representing magnetomotive force per unidade length ou equivalently current per unidade length in an ideal solenoid. Inside a long solenoid: H = nI, onde n é turns per meter. O relationship to B-field in vacuum é B = μ₀H, onde μ₀ = 4π × 10⁻⁷ H/m. In materials, B = μ₀μᵣH com relative permeability μᵣ ranging from ~1 (air) to 100,000+ (specialized alloys).

Oersted (Oe) – O CGS unidade of magnetic field strength, named after Hans Christian Ørsted who discovered electromagnetism in 1820. 1 Oe = 1000/(4π) A/m ≈ 79.577 A/m. O oersted remains dominant in permanent magnet specifications: ferrite magnets têm coercivity ~2000-4000 Oe; alnico ~600-2000 Oe; rare-earth (NdFeB) ~10,000-25,000 Oe. Magnético recording media também use oersteds for coercivity.

Kiloampere per meter (kA/m) – 1000 A/m, o prático SI unidade for magnetic material data sheets e strong fields. Saturation magnetization of iron é sobre 1700 kA/m. Coercivity of NdFeB magnets é 800-2000 kA/m. Este unidade avoids o SI-CGS confusion esse plagues o oersted.

Gilbert per centimeter (Gb/cm) – CGS unidade exatamente igual to o oersted by definition. 1 Gb/cm = 1 Oe ≈ 79.58 A/m. Este notation makes o relationship to magnetomotive force (gilberts) explicit.

Ampere per centimeter (A/cm) – 100 A/m, occasionally usado as a compromise entre A/m e o CGS sistema. Convenient for alguns laboratory medições onde centimeter scales são natural.