What is the difference between an ammeter and a voltmeter?

An ammeter measures electric current (in amperes) and must be connected in series. A voltmeter measures electric potential difference (in volts) and must be connected in parallel.

Can I use a multimeter as an ammeter?

Yes, a multimeter is a versatile instrument that includes an ammeter function, along with voltmeter and ohmmeter capabilities.

Why does an ammeter have very low resistance?

It has very low internal resistance to minimise its impact on the current it is measuring when connected in series. A high resistance would significantly reduce the circuit current.

Is 'ammeter' used in everyday English?

No, it is a specialised technical term used almost exclusively in electrical, engineering, and scientific contexts.

ammeter

UK/ˈæmiːtə/US/ˈæˌmiːtər/

Technical

My Flashcards

Definition

Meaning

An instrument for measuring electric current in amperes.

A device, typically with a dial or digital display, that indicates the magnitude of electric current flowing through a circuit.

Linguistics

Semantic Notes

The term is a compound of 'ampere' (unit of current) and 'meter' (measuring device). It refers specifically to a measuring instrument, not to the unit of measurement itself.

Dialectal Variation

British vs American Usage

Differences

No significant differences in meaning or usage. Spelling and pronunciation are consistent.

Connotations

Purely technical term with no regional connotations.

Frequency

Equally low-frequency in both dialects, used only in technical/engineering contexts.

Vocabulary

Collocations

strong

digital ammeteranalogue ammeterconnect the ammeterammeter reading

medium

calibrate the ammeterammeter scaleshunt ammeter

weak

portable ammeterbroken ammeteraccurate ammeter

Grammar

Valency Patterns

The ammeter measures [current].Connect the ammeter in [series] with the circuit.The reading on the ammeter showed [X amps].

Vocabulary

Synonyms

Neutral

current meter

Weak

amp metercurrent gauge

Vocabulary

Antonyms

voltmeter

Usage

Context Usage

Business

Rare, except in procurement for electrical equipment.

Academic

Used in physics and engineering textbooks and labs.

Everyday

Virtually never used in everyday conversation.

Technical

Standard term in electrical engineering, electronics, and automotive diagnostics.

Examples

By CEFR Level

The mechanic used an ammeter to check the car battery.

To measure the current, you must connect the ammeter in series with the component.

The analogue ammeter's needle deflected sharply, indicating a potential short circuit.

Learning

Memory Aids

Mnemonic

Think: 'AMMeter' measures 'AMperes'.

Conceptual Metaphor

A METER IS AN EYE (it 'sees' or detects the flow of current).

Watch out

Common Pitfalls

Translation Traps (for Russian speakers)

Do not confuse with 'ammunition' or 'ammonia'. The Russian equivalent is 'амперметр' (ampermetr).

Common Mistakes

Misspelling as 'ameter' or 'ametre'.
Confusing it with a 'voltmeter' (measures voltage, not current).
Using it as a general term for any electrical meter.

Practice

Quiz

Fill in the gap

An electrician uses an to check if a circuit is drawing too much current.

Multiple Choice

How must an ammeter be connected in a circuit to function correctly?

FAQ

Frequently Asked Questions

: An ammeter measures electric current (in amperes) and must be connected in series. A voltmeter measures electric potential difference (in volts) and must be connected in parallel.
: Yes, a multimeter is a versatile instrument that includes an ammeter function, along with voltmeter and ohmmeter capabilities.
: It has very low internal resistance to minimise its impact on the current it is measuring when connected in series. A high resistance would significantly reduce the circuit current.
: No, it is a specialised technical term used almost exclusively in electrical, engineering, and scientific contexts.