voltmeter
C1-C2 / TechnicalTechnical/Scientific
Definition
Meaning
A device for measuring electric potential difference (voltage) between two points in an electric circuit.
In a broader technical sense, any instrument or system (including digital/software-based) designed to quantify voltage. Can be part of a larger measuring apparatus like a multimeter.
Linguistics
Semantic Notes
A hyponym of 'meter' and 'measuring instrument'. The word is a compound of 'volt' (unit) + 'meter' (measuring device). It denotes a tool with a specific, narrow function.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences. Spelling follows national conventions for 'meter' (UK: metre for unit of length, but 'meter' for measuring device is standard).
Connotations
Identical technical connotations in both dialects.
Frequency
Equally common in technical contexts in both regions. Virtually unknown in everyday non-technical conversation.
Vocabulary
Collocations
Grammar
Valency Patterns
Use the voltmeter to measure [voltage/ potential difference]Connect the voltmeter across [the component/ the two points]The voltmeter indicates/shows [a reading]Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “None”
Usage
Context Usage
Business
Rare. Might appear in procurement specs for electrical equipment.
Academic
Common in physics, engineering, and electronics textbooks, lab manuals, and courses.
Everyday
Extremely rare outside of DIY electronics or automotive repair contexts.
Technical
The primary register. Used by electricians, engineers, technicians, and hobbyists.
Examples
By Part of Speech
verb
British English
- The technician will voltmeter the circuit to check for a drop.
American English
- You need to voltmeter the outlet before plugging in the device.
adverb
British English
- He checked the battery voltmeter-style, in parallel.
American English
- The measurement was taken voltmeter-accurate.
adjective
British English
- The voltmeter reading was steady at 230 volts.
American English
- Ensure you have the correct voltmeter probes for the job.
Examples
By CEFR Level
- The simple circuit diagram shows where to place the voltmeter.
- To diagnose the fault, I used a voltmeter to measure the voltage across the resistor, which was significantly lower than expected.
- The high-input-impedance digital voltmeter ensured that the measurement process itself did not load the circuit and distort the reading.
Learning
Memory Aids
Mnemonic
Think: A VOLT METER — it meters (measures) volts, just like a thermometer measures thermal heat.
Conceptual Metaphor
A VOLTMETER IS A GAUGE FOR ELECTRICAL PRESSURE. (Analogy: voltage as pressure, current as flow.)
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid calquing as 'вольтметр' in English text; use 'voltmeter'.
- Do not confuse with 'ammeter' (амперметр) which measures current, not voltage.
Common Mistakes
- Misspelling as 'voltmetre' (UK length unit interference).
- Confusing its use with an ammeter (voltmeter is connected in parallel, ammeter in series).
- Using 'voltmeter' as a general term for any multimeter function.
Practice
Quiz
How is a voltmeter correctly connected to a circuit component to measure the voltage across it?
FAQ
Frequently Asked Questions
A voltmeter measures only voltage. A multimeter is a multifunction instrument that can typically measure voltage, current, and resistance (and often more), acting as a voltmeter when set to the correct mode.
No, not directly. A voltmeter is designed for parallel connection to measure potential difference. To measure current, you need an ammeter, which is connected in series. Attempting to measure current with a voltmeter can cause a short circuit.
A negative reading typically indicates that the test leads (positive and negative) are connected opposite to the polarity of the voltage being measured. Reverse the leads, and the reading should become positive.
Only if the voltmeter is specifically rated for the voltage (e.g., CAT III or CAT IV for mains) and you are trained to work safely with high voltage. Incorrect use can lead to severe electric shock or equipment damage.