magnetic field
B2Formal, Technical
Definition
Meaning
The region around a magnet or an electric current where magnetic forces can be detected and measured.
Any area of influence or force, particularly an intangible yet powerful one, such as a person's charisma or a company's culture.
Linguistics
Semantic Notes
In physics, a fundamental concept linking electricity and magnetism. In extended use, implies an invisible but powerful attracting or directing force.
Dialectal Variation
British vs American Usage
Differences
No significant difference in meaning or usage. Spelling of related words follows regional conventions (e.g., 'metre' vs. 'meter' for units of field strength).
Connotations
Identical technical meaning. Informal figurative use is equally common in both varieties.
Frequency
Slightly higher frequency in American English due to the prominence of technical and scientific media, but the difference is minimal.
Vocabulary
Collocations
Grammar
Valency Patterns
The [NOUN] generates a magnetic field.The magnetic field [VERB] the particles.A magnetic field of [NUMBER] [UNIT].Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “to have a magnetic field (figurative: to be very charismatic)”
- “to be caught in someone's magnetic field (figurative: to be strongly influenced)”
Usage
Context Usage
Business
Used figuratively: 'The new CEO created a magnetic field that drew talent to the company.'
Academic
Core concept in physics, earth sciences, and engineering. 'The study measured the magnetic field fluctuations.'
Everyday
Used when discussing magnets, compasses, or MRI scans. 'The speaker had a magnetic field that captivated the audience.'
Technical
Precise, measurable vector field. 'The solenoid's axial magnetic field was calculated using Ampère's law.'
Examples
By Part of Speech
verb
British English
- The device is used to magnetically field-map the interior.
- How can we magnetic-field shield this component?
American English
- The probe magnetically fields the surrounding area.
- The system is designed to magnetic-field-align the particles.
adverb
British English
- The particles behaved magnetic-field-dependently.
- The material was aligned magnetic-field-wise.
American English
- The device reads magnetic-field-accurately.
- It was oriented magnetic-field-appropriately.
adjective
British English
- The magnetic-field measurement was precise.
- We studied magnetic-field-line reconnection.
American English
- The magnetic-field sensor is highly sensitive.
- They observed a magnetic-field reversal.
Examples
By CEFR Level
- A magnet has a magnetic field.
- The Earth has a big magnetic field.
- The compass needle points north because of the Earth's magnetic field.
- A strong magnetic field can erase credit cards.
- Scientists are concerned about the weakening of the planet's protective magnetic field.
- The MRI machine uses a powerful magnetic field to create images of the body.
- The research proposes a novel method for shielding sensitive equipment from external magnetic field interference.
- Her charismatic personality generated a magnetic field that attracted followers and repelled critics in equal measure.
Learning
Memory Aids
Mnemonic
Imagine a MAGNET with lines of FORCE stretching out like a FIELD of grass around it.
Conceptual Metaphor
INFLUENCE IS A MAGNETIC FIELD (e.g., 'He was drawn into her magnetic field of charm.')
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid translating directly as 'магнитное поле' in non-physics contexts where 'сфера влияния', 'притягательная сила', or 'харизма' might be more appropriate.
Common Mistakes
- Confusing 'magnetic field' (the region) with 'magnetic force' (the interaction within that region). Using 'magnetic' as a noun (incorrect: 'the magnetic is strong'; correct: 'the magnetic field is strong').
Practice
Quiz
In which context is 'magnetic field' used in a non-literal, figurative sense?
FAQ
Frequently Asked Questions
It is a two-word compound noun, typically written as separate words. The hyphenated form 'magnetic-field' is only used when it functions as a modifier before another noun (e.g., 'magnetic-field strength').
Both are fundamental forces, but a magnetic field is produced by moving electric charges (current) or intrinsic magnetic moments of particles, and it interacts primarily with other magnets or moving charges. Gravity is produced by mass and interacts with all mass.
Generally, no, not consciously. However, some research suggests a protein in the human eye might allow for subconscious detection, though this is not a proven 'sense' like sight or touch. Many animals, like birds and sharks, have a proven magnetic sense for navigation.
It creates a protective shield, called the magnetosphere, which deflects most of the solar wind (charged particles from the Sun). This protects the atmosphere from erosion and life on the surface from harmful radiation.