electrometer
CTechnical / Scientific
Definition
Meaning
An instrument for measuring electric potential difference or electric charge.
In scientific contexts, it can refer to any sensitive device used to detect or measure small electric currents or static electrical charges, often used in physics experiments, radiation detection, and atmospheric science.
Linguistics
Semantic Notes
The term is specific to physics and electrical engineering. It is not to be confused with a voltmeter, which measures voltage in a circuit, as electrometers often measure very small charges or potentials with high input impedance.
Dialectal Variation
British vs American Usage
Differences
No significant lexical or spelling differences. The instrument name is identical.
Connotations
Neutral technical term in both varieties.
Frequency
Equally low-frequency in both dialects, confined to specialised technical fields.
Vocabulary
Collocations
Grammar
Valency Patterns
The [scientist/technician] used an electrometer to [verb: measure/detect/record] the [noun: charge/potential/ionization].Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “None”
Usage
Context Usage
Business
Not used.
Academic
Used in physics, electrical engineering, and experimental science papers and textbooks.
Everyday
Virtually never used in everyday conversation.
Technical
Core term in instrumentation for measuring electrical charge, potential, or ionizing radiation.
Examples
By Part of Speech
verb
British English
- The lab assistant will electrometer the sample's surface potential.
- We need to electrometer the charge distribution.
American English
- The technician will electrometer the sample's surface potential.
- We need to electrometer the charge buildup.
adverb
British English
- The charge was measured electrometrically.
American English
- The potential was recorded electrometrically.
adjective
British English
- The electrometeric reading was crucial.
- They used an electrometer-based approach.
American English
- The electrometer reading was crucial.
- They used an electrometer-based technique.
Examples
By CEFR Level
- The scientist used a special instrument called an electrometer to detect the tiny electric charge.
- An electrometer is more sensitive than a normal voltmeter.
- The experiment required a vibrating reed electrometer to measure the minute ionisation current accurately.
- They calibrated the high-impedance electrometer before taking measurements of the electrostatic potential.
Learning
Memory Aids
Mnemonic
Think of 'ELECTRO' (electricity) + 'METER' (measurer). It's a meter for electrical charge.
Conceptual Metaphor
A microscope for electricity (makes invisible electric charges measurable and visible).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid confusing with 'вольтметр' (voltmeter). While related, an electrometer ('электрометр') is specifically for very small charges/static electricity.
Common Mistakes
- Misspelling as 'electometer' (dropping the 'r'), confusing it with a general-purpose multimeter or voltmeter.
Practice
Quiz
What is the primary function of an electrometer?
FAQ
Frequently Asked Questions
No. While both measure electrical potential, an electrometer is designed for extremely high input impedance and can measure very small charges or currents, often in electrostatic or high-vacuum contexts.
It is used in physics research, radiation detection (like in Geiger counters), atmospheric science (measuring atmospheric electricity), and materials science for surface charge analysis.
Indirectly, yes. By measuring the voltage drop across a known high-value resistor, an electrometer can be used to calculate very small currents (in the picoampere or femtoampere range).
It's a specific, highly sensitive type of electrometer where a vibrating capacitor ('reed') converts a DC voltage into an AC signal, which is easier to amplify and measure accurately.