Is the abwatt still used today?

No, it is an obsolete unit from the CGS electromagnetic system, completely replaced by the watt in the SI system.

What does the 'ab-' prefix in 'abwatt' mean?

It stands for 'absolute', derived from the 'absolute' system of electrical units in the CGS framework.

How many watts are in one abwatt?

One abwatt is exactly 0.0000001 (10^-7) watts.

Would an engineering student need to know the abwatt?

Only for historical context or understanding very old technical literature; it is not part of modern engineering curricula.

abwatt

Rare/Specialized

UK/ˈæbwɒt/US/ˈæbwɑːt/

Technical/Scientific

My Flashcards

Definition

Meaning

A unit of power in the centimetre-gram-second (CGS) electromagnetic system, equal to one ten-millionth of a watt.

A rarely used, obsolete scientific measurement unit, primarily of historical interest in physics and engineering contexts.

Linguistics

Semantic Notes

The term is a compound of 'ab-' (from 'absolute' in the CGS system) and 'watt'. It represents power dissipation in a circuit where the flow is one abampere across a potential difference of one abvolt.

Dialectal Variation

British vs American Usage

Differences

No discernible difference in usage; the term is equally obscure and specialized in both varieties of English.

Connotations

Carries connotations of obsolete technical systems and historical scientific literature.

Frequency

Virtually never encountered outside historical or highly specialized technical documents.

Vocabulary

Collocations

strong

electromagnetic systemCGS systempower unit

medium

one abwattmeasure in abwattsabwatt is defined

weak

historicalobsoletescientific

Grammar

Valency Patterns

[number] abwatts of [power/output]a power of [number] abwatts

Vocabulary

Synonyms

Neutral

CGS unit of power

Weak

historical watt equivalent

Vocabulary

Antonyms

wattkilowatt

Usage

Context Usage

Business

Not used.

Academic

Only in historical discussions of measurement systems or physics history.

Everyday

Never used.

Technical

Extremely rare; appears only in references to pre-SI (CGS) electromagnetic units.

Examples

By Part of Speech

adjective

British English

The abwatt unit is no longer standard.
An abwatt measurement was recorded.

American English

The abwatt definition is archaic.
An abwatt value was cited.

Examples

By CEFR Level

The abwatt is an old unit for measuring power.
One abwatt equals 10^-7 watts.

In the obsolete CGS electromagnetic system, power was sometimes expressed in abwatts.
The textbook noted that the experiment's output was calculated as 150 abwatts.

Learning

Memory Aids

Mnemonic

Think: 'ABsolute' WATT - a watt from the old 'absolute' (CGS) system.

Conceptual Metaphor

A FOSSIL OF MEASUREMENT: an outdated, preserved unit from a previous era of science.

Watch out

Common Pitfalls

Translation Traps (for Russian speakers)

Do not confuse with 'ab' as a Russian prefix meaning 'away from'. It is part of a technical compound.
It is not related to 'ab' as in 'abnormal'.

Common Mistakes

Mispronouncing as 'ab-watt' with a clear separation.
Confusing it with the modern 'watt' and using it in contemporary contexts.

Practice

Quiz

Fill in the gap

The is a historical unit from the CGS system, equivalent to 10^-7 watts.

Multiple Choice

The 'abwatt' is primarily used in which context?

FAQ

Frequently Asked Questions

: No, it is an obsolete unit from the CGS electromagnetic system, completely replaced by the watt in the SI system.
: It stands for 'absolute', derived from the 'absolute' system of electrical units in the CGS framework.
: One abwatt is exactly 0.0000001 (10^-7) watts.
: Only for historical context or understanding very old technical literature; it is not part of modern engineering curricula.