# Talk:Watt balance

WikiProject Physics (Rated C-class, Mid-importance)
This article is within the scope of WikiProject Physics, a collaborative effort to improve the coverage of Physics on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.
C  This article has been rated as C-Class on the project's quality scale.
Mid  This article has been rated as Mid-importance on the project's importance scale.
WikiProject Measurement (Rated C-class, High-importance)
This article is within the scope of WikiProject Measurement, a collaborative effort to improve the coverage of Measurement on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.
C  This article has been rated as C-Class on the project's quality scale.
High  This article has been rated as High-importance on the project's importance scale.

...same way that the speed of light is defined by the definition of the meter... I suppose, it should be "meter is defined by the definition of speed of light"...?

## Diagram

Metrology in the balance fig 3 has a good schematic diagram of a Watt balance. Also discusses recent accuracies. Rod57 (talk) 01:20, 28 March 2011 (UTC)

## Improvement over Ampere Balance

The article says the watt balance is better than the ampere balance because there's no need to measure distances. But the calibration of the watt balance requires measurement of speed ('v' in the article). And I would naively think measuring speed means measuring distance.

I'm sure there's an well known explanation but I would've liked to see it in the article. LegendLength (talk) 09:23, 5 October 2012 (UTC)

## U vs V

U is traditionally used for potential ENERGY, not potential difference aka Voltage V. The use of the outdated term "Potential Difference" and the symbol U in this context creates a huge amount of confusion in introductory and even advanced physics. We should use Voltage and V in this article to avoid the same issue. — Preceding unsigned comment added by 71.183.128.65 (talk) 18:01, 28 November 2016 (UTC)