Magnetic Field
A region around a magnet where magnetic forces act on other magnets and moving charges.
Also: B field · magnetic flux density
Definition
A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and other magnets. It is produced by moving electric charges and intrinsic magnetic moments of particles. Magnetic fields are visualized as field lines and are measured in units of Tesla. They are fundamental to electromagnetism and technologies such as MRI, electric motors, and data storage.
Example
“Iron filings sprinkled around a bar magnet align themselves along the magnetic field lines, forming a visible pattern that reveals the invisible field's shape from north to south pole.”
Usage Examples
- 1
“The team applied magnetic field best practices to improve their physics outcomes significantly.”
- 2
“Understanding magnetic field is essential for anyone building a career in STEM.”
When & How to Use
Use 'Magnetic Field' when working in Physics contexts where a magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and other magnets.
- ▸Applying magnetic field principles during a physics project or initiative
- ▸Explaining magnetic field to a junior team member or stakeholder unfamiliar with STEM
- ▸Evaluating options or proposals using magnetic field as a decision-making criterion
Etymology & Origin
The term 'Magnetic Field' derives from Latin roots and entered STEM professional usage as the field formalised in the 20th century.
History & Evolution
The concept of magnetic field has evolved alongside STEM. Early practitioners relied on informal methods; structured approaches emerged with the professionalisation of physics in the mid-20th century. Today, magnetic field is a standard part of STEM practice globally.
Synonyms
- B field
- magnetic flux density
- magnetic force field
Antonyms / Opposites
- electric field
Images
CC-licensed · free to useVideo
Related Terms
- Electromagnetism
- Electromagnetic Induction
- Electric Field
- Lorentz Force