dielectric loss: meaning, definition, pronunciation and examples
Very LowHighly technical, specialized
Quick answer
What does “dielectric loss” mean?
A physical property of a dielectric material: the loss of energy in the form of heat when an alternating electric field is applied to it.
Audio
Pronunciation
Definition
Meaning and Definition
A physical property of a dielectric material: the loss of energy in the form of heat when an alternating electric field is applied to it.
Specifically, the dissipation of electrical energy (as heat) within a dielectric material subjected to a varying electric field. It is a key factor in capacitor inefficiency and signal attenuation in high-frequency circuits. Quantitatively measured by the loss tangent (tan δ).
Dialectal Variation
British vs American Usage
Differences
No spelling or conceptual differences. Pronunciations differ slightly. The term is used identically in technical contexts on both sides of the Atlantic.
Connotations
None beyond its strict technical meaning.
Frequency
Identically rare outside of electrical engineering, physics, and materials science.
Grammar
How to Use “dielectric loss” in a Sentence
The [material] exhibits [adjective] dielectric loss.Dielectric loss in [component] leads to [undesirable effect].Minimising dielectric loss is crucial for [application].The dielectric loss tangent of [material] is [value].Vocabulary
Collocations
Examples
Examples of “dielectric loss” in a Sentence
verb
British English
- The capacitor's dielectric is lossy, causing it to dissipate significant energy.
- The material begins to loss energy through dielectric mechanisms at high frequencies.
American English
- The circuit board laminate can lose power through dielectric effects.
- At that frequency, the insulator will dissipate energy due to dielectric loss.
adverb
British English
- (No standard adverbial form exists. A paraphrased form would be: 'The energy was lost dielectrically.')
American English
- (No standard adverbial form exists. A paraphrased form would be: 'Power dissipates primarily through dielectric means.')
adjective
British English
- We need a low-dielectric-loss material for the RF filter.
- The dielectric-loss characteristics of the ceramic were measured.
American English
- The high-dielectric-loss substrate caused excessive heating.
- They published a paper on dielectric-loss mechanisms in polymers.
Usage
Meaning in Context
Business
Only in the context of electronics component manufacturing, materials sourcing, or product specifications (e.g., 'This polymer's low dielectric loss improves our amplifier's efficiency').
Academic
Central term in papers on electrical engineering, materials science, and applied physics. Used in research on capacitors, transmission lines, and insulating materials.
Everyday
Virtually never used in everyday conversation.
Technical
The primary context. Used in datasheets, circuit design, materials testing, and discussions about signal integrity, power efficiency, and heat generation in insulators.
Vocabulary
Synonyms of “dielectric loss”
Strong
Neutral
Weak
Vocabulary
Antonyms of “dielectric loss”
Watch out
Common Mistakes When Using “dielectric loss”
- Using 'dielectric loss' to refer to the breakdown of an insulator (that's 'dielectric breakdown').
- Pronouncing 'dielectric' as /'di:.lektrik/ instead of /daɪ.ɪ'lek.trɪk/.
- Confusing 'dielectric loss' (energy dissipation) with 'dielectric constant' (a material's ability to store electrical energy).
FAQ
Frequently Asked Questions
No. Resistance (Ohmic loss) occurs in conductors and is due to electron flow. Dielectric loss occurs in insulators (dielectrics) and is due to the oscillation/reorientation of molecules or charges in an alternating electric field.
It represents inefficiency. Energy that is lost as heat is not stored in the electric field, reducing the capacitor's performance, causing self-heating, and potentially leading to failure in high-power applications.
It means the material is a poor insulator for alternating current (AC) at the given frequency. It will absorb significant electrical energy and convert it to heat, making it unsuitable for efficient capacitors or high-frequency insulators.
It is typically quantified by the 'loss tangent' (tan δ) or the 'dissipation factor'. This is a dimensionless number representing the ratio of the lossy (resistive) part to the lossless (reactive) part of the material's response to an AC field. It's measured using specialised impedance analysers or LCR meters.
A physical property of a dielectric material: the loss of energy in the form of heat when an alternating electric field is applied to it.
Dielectric loss is usually highly technical, specialized in register.
Dielectric loss: in British English it is pronounced /ˌdaɪ.ɪˈlɛk.trɪk lɒs/, and in American English it is pronounced /ˌdaɪ.ɪˈlɛk.trɪk lɔːs/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “(none exist for this highly technical term)”
Learning
Memory Aids
Mnemonic
Imagine a DIamond (a good dielectric) in an ELECTRIC field getting LOSS of its coolness (turning into heat). Dielectric -> Energy LOSS.
Conceptual Metaphor
FRICTION FOR ELECTRONS. Just as mechanical friction turns motion into heat, dielectric loss turns electrical oscillation (AC field) into heat within the insulating material.
Practice
Quiz
What is the primary physical manifestation of dielectric loss?