gyromagnetic ratio: meaning, definition, pronunciation and examples
C2Highly technical/scientific
Quick answer
What does “gyromagnetic ratio” mean?
A constant for a given particle or nucleus representing the ratio of its magnetic dipole moment to its angular momentum.
Audio
Pronunciation
Definition
Meaning and Definition
A constant for a given particle or nucleus representing the ratio of its magnetic dipole moment to its angular momentum.
A fundamental physical property that quantifies how a particle with angular momentum, like an electron or atomic nucleus, will precess in a magnetic field; crucial in nuclear magnetic resonance (NMR) and magnetic resonance imaging (MRI).
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage. Pronunciation may follow regional patterns for 'gyro-' and 'ratio'.
Connotations
None beyond its strict scientific definition.
Frequency
Extremely low frequency in general discourse, identical and specialised in both academic/technical contexts.
Grammar
How to Use “gyromagnetic ratio” in a Sentence
The gyromagnetic ratio of [PARTICLE] is [VALUE].One must consider the gyromagnetic ratio when [CALCULATING/ANALYSING].Vocabulary
Collocations
Examples
Examples of “gyromagnetic ratio” in a Sentence
adjective
British English
- The gyromagnetic-ratio value was pivotal to the calculation.
American English
- The gyromagnetic-ratio constant is tabulated in the appendix.
Usage
Meaning in Context
Business
Not used.
Academic
Used in advanced physics, chemistry, and engineering textbooks and research papers on quantum mechanics, NMR, MRI, or particle physics.
Everyday
Virtually never used.
Technical
Core term in spectroscopy, MRI technology development, and fundamental physics research.
Vocabulary
Synonyms of “gyromagnetic ratio”
Neutral
Weak
Watch out
Common Mistakes When Using “gyromagnetic ratio”
- Using it as a variable that changes for an individual particle (it's a constant for a particle type).
- Confusing it with the g-factor (which is dimensionless; the gyromagnetic ratio has units).
- Misspelling as 'geomagnetic ratio' (which relates to Earth's magnetism).
FAQ
Frequently Asked Questions
Yes, it is a fundamental constant for the electron. For other particles, like protons or neutrons, it is a different, specific constant.
Common units are radians per second per tesla (rad·s⁻¹·T⁻¹) or the equivalent hertz per tesla (Hz/T).
The gyromagnetic ratio γ is proportional to the g-factor. Specifically, γ = (g * q) / (2m), where q is charge and m is mass.
Different atomic nuclei (like hydrogen in water) have unique gyromagnetic ratios. This allows an MRI machine to tune its radio waves to selectively excite and image specific nuclei in the body.
A constant for a given particle or nucleus representing the ratio of its magnetic dipole moment to its angular momentum.
Gyromagnetic ratio is usually highly technical/scientific in register.
Gyromagnetic ratio: in British English it is pronounced /ˌdʒaɪrəʊmæɡˈnetɪk ˈreɪʃiəʊ/, and in American English it is pronounced /ˌdʒaɪroʊmæɡˈnɛtɪk ˈreɪʃioʊ/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think of a GYROscope (spinning) interacting with a MAGNET. The RATIO tells you how much magnetic twist you get per unit of spin.
Conceptual Metaphor
A SPINNING TOP'S MAGNETIC PERSONALITY: The ratio is like a fixed 'exchange rate' between its inherent spin (angular momentum) and its magnetic 'strength' (dipole moment).
Practice
Quiz
The gyromagnetic ratio is fundamental to which everyday technology?