ohmic resistance
LowTechnical, Academic
Definition
Meaning
The property of a conductor that opposes the flow of electric current, defined by Ohm's Law as the ratio of voltage to current.
In a broader electrical engineering context, it can refer to the real part of impedance in AC circuits, representing the energy loss as heat, as opposed to reactive components.
Linguistics
Semantic Notes
Refers specifically to resistance that is linear and frequency-independent in an ideal sense. Often contrasted with 'impedance' or 'reactance'. The term 'ohmic' explicitly links it to Ohm's Law.
Dialectal Variation
British vs American Usage
Differences
No significant lexical or grammatical differences. Spelling of related terms may follow regional conventions (e.g., 'metre' vs. 'meter' for the unit).
Connotations
Purely technical, with no differential connotations between varieties.
Frequency
Equally low-frequency in general discourse but standard and identical in technical contexts in both regions.
Vocabulary
Collocations
Grammar
Valency Patterns
The ohmic resistance of [COMPONENT] is [VALUE].To determine the ohmic resistance, [ACTION].[COMPONENT] exhibits an ohmic resistance of [VALUE].Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Usage
Context Usage
Business
Rarely used except in technical specifications, procurement documents, or product datasheets for electrical components.
Academic
Core concept in physics and electrical engineering courses, textbooks, and research papers on circuit theory and materials science.
Everyday
Virtually never used in casual conversation. Might be encountered by hobbyists in electronics.
Technical
Standard term in circuit design, analysis, component characterisation, and electrical measurements.
Examples
By Part of Speech
adjective
British English
- The component displays ohmic behaviour.
- We observed an ohmic characteristic in the graph.
American English
- The device has an ohmic response.
- An ohmic contact is essential for the measurement.
Examples
By CEFR Level
- A simple wire has ohmic resistance.
- The light bulb's filament provides ohmic resistance.
- You can calculate the ohmic resistance of the circuit using Ohm's Law.
- He measured the ohmic resistance of the sample with a multimeter.
- The model assumes a purely ohmic resistance, neglecting any capacitive effects.
- At high frequencies, the conductor's effective ohmic resistance increases due to the skin effect.
Learning
Memory Aids
Mnemonic
Think of 'OHM-ic' as coming from 'OHM', the unit of resistance, named after Georg Ohm. It's the resistance that obeys OHM's law.
Conceptual Metaphor
ELECTRIC CURRENT IS FLUID FLOW; OHMIC RESISTANCE IS FRICTION or NARROWING OF A PIPE.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid direct calque 'омическое сопротивление' in non-technical English writing; use 'resistance' or specify 'ohmic' only if contrasting with reactance.
- Do not confuse with 'impedance' ('полное сопротивление'). 'Ohmic resistance' is only the real part.
- The word 'ohmic' is an adjective; ensure correct word order: 'ohmic resistance', not 'resistance ohmic'.
Common Mistakes
- Using 'ohmic resistance' to describe non-linear components like diodes (which have non-ohmic resistance).
- Confusing it with 'impedance' in AC circuit discussions.
- Incorrect pronunciation of 'ohmic' as /'ɒmɪk/ instead of /'əʊmɪk/ or /'oʊmɪk/.
Practice
Quiz
What is the defining characteristic of an ohmic resistance?
FAQ
Frequently Asked Questions
No. Impedance is a more general concept for AC circuits that includes both ohmic resistance (the real part) and reactance (the imaginary part). Ohmic resistance is the DC or purely dissipative component.
It is named after Georg Simon Ohm, the physicist who formulated Ohm's Law, which describes the relationship between voltage, current, and resistance for such conductors.
In theory, superconductors have zero resistance below a critical temperature. In practice, all normal conductors have some finite ohmic resistance.
Use 'ohmic resistance' when you need to specifically emphasise the linear, non-reactive property obeying Ohm's Law, often in contrast to reactance or in technical discussions about the nature of the resistance.