# watt

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Related to watt: James Watt, Joule, Watt hour

## watt

[for James WattWatt, James,
1736–1819, Scottish inventor. While working at the Univ. of Glasgow as an instrument maker, Watt was asked to repair a model of Thomas Newcomen's steam engine.
], abbr. W, unit of power, or work done per unit time, equal to 1 joule per second. It is used as a measure of electrical and mechanical power. One watt is the amount of power that is delivered to a component of an electric circuit when a current of 1 ampere flows through the component and a voltage of 1 volt exists across it. The derivative units are kilowatt (1,000 W; kW) and megawatt (1,000,000 W; MW), used in electric power systems, and milliwatt (0.001 W; mW) and microwatt (0.000001 W; μW), used in electronics.

## watt

(wot) Symbol: W. The SI unit of power, defined as the power resulting from the dissipation of one joule of energy in one second.

## watt

[wät]
(physics)
The unit of power in the meter-kilogram-second system of units, equal to 1 joule per second. Symbolized W.

## watt

A unit of power; the power required to do work at the rate of 1 joule per second, which is equal to the power dissipated in an electric circuit in which a potential difference of 1 volt causes a current of 1 ampere to flow.

## watt

the derived SI unit of power, equal to 1 joule per second; the power dissipated by a current of 1 ampere flowing across a potential difference of 1 volt. 1 watt is equivalent to 1.341 × 10--3 horsepower.

## Watt

James. 1736--1819, Scottish engineer and inventor. His fundamental improvements to the steam engine led to the widespread use of steam power in industry

## watt

The standard unit of measurement of electrical power. One watt is one ampere of current flowing at one volt. Watts are typically rated as AMPS x VOLTS or VOLT-AMP (V-A). However, this rating is only equivalent to watts when it applies to devices that absorb all the energy, such as electric heating coils or incandescent light bulbs. With computer power supplies, the actual watt rating is only 60% to 70% of the VOLT-AMP rating.
References in periodicals archive ?
Infrared ceramic heaters with watt densities to 40 w/[in.
Watt draws his conclusions from a nucleus of five prose fictions: Defoe's Robinson Crusoe and Moll Flanders, Richardson's Pamela and Clarissa, and Fielding's Tom Jones.
Watt had a team of non-minority and minority professionals advise him when he started NextMedium and he continues to value their advice.
Watt says the Sennebogen handlers have earned good reviews from operators and maintenance personnel.
Watt was especially struck by an interview toward the end of his fieldwork in which the Oak Grove pastor, a graduate of Bob Jones University, aggressively stressed the loathsomeness of gays and lesbians.
An incentive for other manufacturers is President Bush's July 2001 executive order that all government agencies purchase appliances that use 1 watt or less of standby power, if available.
Strengthening the link of the Josephson voltage standard to the SI system was a task that has been dominated by watt balance experiments.
Instead, Nina Watt became one of the preeminent modern, dancers of her generation with an ability to dance almost anything.
Watt said he didn't know where in Nassau state officials might establish the zone, but suggested that under new rules, the entire county could be designated.
Hurley was all smiles and one-sentence answers with a crying son on his lap, and Watt just rambled in that way only Watt can ramble.
Most breach of promise cases were brought by female plaintiffs who did still wish to marry, though Watt discovers that the number of such cases declined in the seventeenth century at the same time that the number of illegitimate births increased.
Calculating power levels for a pulsed laser, APS estimates that a 1-pulse-per-second laser would need 100 million watts, which still is 16 times greater than the 6 million watt estimate arrived at by Wood and Canavan.

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