electric potential
C1/C2Technical/Scientific
Definition
Meaning
The amount of electric potential energy per unit charge at a point in an electric field, measured in volts. The work needed to move a unit positive charge from a reference point (like infinity) to that point without acceleration.
A scalar quantity that characterizes the potential energy landscape of an electric field. It provides a measure of the driving force for electric current and is fundamental to understanding circuits and electrostatics.
Linguistics
Semantic Notes
The term is almost exclusively used in physics and electrical engineering contexts. It is a key concept linking the physical field to measurable voltage.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences; spelling of related terms follows national conventions (e.g., 'metre' vs. 'meter' in UK vs. US, though the unit 'volt' is identical).
Connotations
Identical technical meaning; zero connotative difference.
Frequency
Identical high frequency in technical discourse in both regions.
Vocabulary
Collocations
Grammar
Valency Patterns
The electric potential [at a point/inside the sphere] is...There is a/an [high/low] electric potential [between the plates].To find the electric potential, one must [calculate/integrate/measure]...[A difference/An increase] in electric potential causes...The electric potential, [which is a scalar quantity],...The electric potential [of/due to] [a charged object]...Electric potential [is defined as/refers to]...If the electric potential [is zero/varies], then...[Setting/Choosing] the electric potential [to be zero] at infinity...Electric potential [can be expressed/derived] as...The electric potential [arising from/created by]...[Contours/Surfaces] of constant electric potential are called...Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “No common idioms exist for this specific technical term.”
Usage
Context Usage
Business
Virtually never used.
Academic
Core term in physics and electrical engineering courses and literature. Used with precise mathematical definition.
Everyday
Extremely rare. A layperson might refer to 'voltage' instead.
Technical
Essential term in circuit analysis, electrostatics, and field theory. Used constantly in research papers, textbooks, and engineering design.
Examples
By Part of Speech
verb
British English
- This configuration potentials the region.
- The charge distributions potentialise the space.
American English
- This configuration potentials the region.
- The charge distributions potentialize the space.
adverb
British English
- The field varies potentially across the gap.
- The system is potentially uniform.
American English
- The field varies potentially across the gap.
- The system is potentially uniform.
adjective
British English
- The potential difference was critical.
- We measured the potential gradient.
American English
- The potential difference was critical.
- We measured the potential gradient.
Examples
By CEFR Level
- A battery creates a difference in electric potential.
- Electric potential is measured in volts.
- The electric potential inside a charged, hollow conductor is constant.
- To find the current, you first need to know the electric potential across the resistor.
- The electric potential V(r) for a point charge is given by Coulomb's law integrated over the path from infinity.
- By solving Laplace's equation with the given boundary conditions, we derived the electric potential distribution throughout the volume.
Learning
Memory Aids
Mnemonic
Think of a hill (the electric field). The electric potential at a point is like the *height* of that point on the hill. Height is a property of the point itself (scalar), while the slope (the electric field) is the force that pushes things downhill. Voltage is just a difference in height/potential.
Conceptual Metaphor
GRAVITATIONAL POTENTIAL (height in a gravitational field). FLUID PRESSURE (pressure difference causes flow, as potential difference causes current).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- The direct translation 'электрический потенциал' (elektricheskiy potentsial) is a perfect cognate and is correct.
- The primary trap is conceptual confusion with 'electric potential energy' ('потенциальная энергия'), which is related but not identical. 'Potential' alone in English (тех. контекст) can mean 'electric potential', similar to Russian 'потенциал'.
- The common term 'voltage' translates as 'напряжение', which is used more broadly in everyday language.
Common Mistakes
- Confusing 'electric potential' (scalar, property of a point) with 'electric field' (vector, force per charge).
- Saying 'electric potential' when meaning 'electric potential *energy*'.
- Forgetting that potential is *relative*; only differences are physically meaningful, though we often assign an arbitrary zero point.
- Using 'electric potential' in non-technical conversation where 'voltage' or 'power' would be better understood.
- Incorrect pluralisation ('electrics potential'). It is a compound noun where 'electric' acts as an adjective; the plural is 'electric potentials'.
Practice
Quiz
What is the SI unit of electric potential?
FAQ
Frequently Asked Questions
Voltage is the difference in electric potential between two points. Electric potential is the value at a single point (relative to a reference). So, voltage is a potential difference.
Yes. Since it's defined relative to an arbitrary zero point (often infinity), it can be positive, negative, or zero. A negative potential means work must be done to bring a positive charge from infinity to that point against the field.
Potential is defined as energy per charge, and energy is a scalar. It's a simpler, single-number description of the field's effect. The electric field (vector) can be found by taking the negative gradient of the potential.
By convention in many problems, electric potential is defined as zero at an infinite distance from all charges, or at 'ground' (Earth) in electrical circuits. The choice is arbitrary, as only differences matter physically.