electric susceptibility
C2technical/scientific
Definition
Meaning
A dimensionless proportionality constant measuring how easily a dielectric material polarizes in response to an applied electric field.
In electromagnetism, it quantifies the degree to which a material becomes electrically polarized under an electric field, relating the polarization density to the electric field strength. It is a fundamental parameter in characterizing dielectric materials.
Linguistics
Semantic Notes
Strictly a physics/engineering term. It is a scalar for isotropic materials and a tensor for anisotropic ones. Often confused with 'dielectric constant' or 'permittivity', which are related but distinct concepts.
Dialectal Variation
British vs American Usage
Differences
No lexical or conceptual differences. Spelling follows the national conventions for 'electric'/'susceptibility'.
Connotations
None beyond the technical meaning.
Frequency
Identically rare and confined to specialized physics and engineering contexts in both varieties.
Vocabulary
Collocations
Grammar
Valency Patterns
The electric susceptibility (of a material) (to an electric field) is...A material with a high electric susceptibility...One can derive the electric susceptibility from...Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Usage
Context Usage
Business
Not used.
Academic
Used in physics, electrical engineering, and materials science lectures, textbooks, and papers.
Everyday
Not used.
Technical
Central to the design of capacitors, insulators, and optical devices. Appears in datasheets and simulation software.
Examples
By CEFR Level
- The electric susceptibility helps scientists understand how materials react to electric fields.
- Materials with a high electric susceptibility are good for making capacitors.
- The electric susceptibility tensor must be considered when analysing anisotropic crystalline materials.
- By measuring the polarisation, one can calculate the electric susceptibility of the dielectric.
- Nonlinear optical effects depend on the higher-order terms of the electric susceptibility.
Learning
Memory Aids
Mnemonic
Think of SUSCEPTIBLE people who are easily influenced. Electric susceptibility measures how easily a material is 'influenced' (polarized) by an electric field.
Conceptual Metaphor
A material's 'willingness' to be polarized. A high susceptibility means the material 'gives in' easily to the electric field.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid translating 'susceptibility' as 'подозрительность' (suspiciousness). The correct term is 'восприимчивость' or specifically 'электрическая восприимчивость'.
- Do not confuse with 'электропроводность' (electrical conductivity), which is a different property.
Common Mistakes
- Pronouncing 'susceptibility' with a /p/ sound instead of /b/ in the middle syllable (it's /səˌsɛptɪˈbɪlɪti/, not /səˌsɛptɪˈpɪlɪti/).
- Using 'electric susceptibility' to refer to magnetic properties (that is 'magnetic susceptibility').
- Confusing it with 'permittivity' (ε). Remember: ε = ε₀(1 + χ_e).
Practice
Quiz
What does the electric susceptibility (χ_e) quantitatively describe?
FAQ
Frequently Asked Questions
No. The dielectric constant (or relative permittivity, ε_r) is related but different: ε_r = 1 + χ_e. Susceptibility measures the added polarisation due to the material itself.
Yes, in certain metamaterials or specific frequency ranges, a negative electric susceptibility can occur, leading to unusual electromagnetic properties.
It is a dimensionless quantity—it is a pure number because it is a ratio of polarization (C/m²) to electric field times vacuum permittivity (also C/m²).
Primarily in university-level physics or electrical engineering courses, textbooks on electromagnetism, and technical literature on dielectrics, optics, or materials science.