Talk:Henry (unit)

What is it?
The description does not give any feel for what a Henry measures — Preceding unsigned comment added by 211.30.6.37 (talk) 12:30, 21 February 2006 (UTC)


 * Henry should be represented as Volt/(Ampere/second) for obvious reasons. It measures the inverse of (d/dt Current)/Voltage. CaffeineWitcher 7:06, 18 March 2020 (UTC)

Plural
Is it henrys or henries? —Keenan Pepper 01:56, 17 March 2006 (UTC)


 * See Talk:Inductance. We seem to have a slight preference for henries, but it's not conclusive. --Heron 18:07, 17 March 2006 (UTC)

Shouldn't this page be renamed to Henry (unit) ?
 * Yes, it should! Melchoir 10:45, 2 June 2006 (UTC)
 * Agree - --Rehnn83 11:11, 20 October 2006 (UTC)
 * Done Steevven1 (Talk) (Contribs) (Gallery) 00:07, 27 May 2007 (UTC)

Why is there a list of multiples? Aren't they just the standard SI prefixes?


 * It's there so that someone following a link from microhenry or whatever will know why they are here. We used to have a bunch of articles about various prefixed units, but they were mostly removed (except in a few cases with special reasons for keeping them) and changed to redirects to the base unit.  These redirects can now be linked to go directly to the section with the table showing what the linked prefixed unit or prefixed unit symbol means.  Gene Nygaard (talk) 02:02, 21 November 2007 (UTC)

Verify
This was on the article page, I moved the comment herre RJFJR 19:24, 30 November 2007 (UTC)

The unit conversion for newton may be off by m, rather than m^2 below


 * $$H = \dfrac{\mbox{m}^2 \cdot \mbox{kg}}{\mbox{s}^{2} \cdot \mbox{A}^2} = \dfrac{\mbox{Wb}}{\mbox{A}} = \dfrac{\mbox{V} \cdot \mbox{s}}{\mbox{A}} = \dfrac{\mbox{m}^2 \cdot \mbox{kg}}{\mbox{C}^2}$$

Sense of scale
It would be nice to add something to give a sense of scale. For example, include some pictures of some inductors. How physically big are typical 1-henry inductors? What is the typical inductance of a inductor the size of your small toe? How much would a 1-henry inductor cost? What about a milihenry?

173.66.241.122 (talk) 08:41, 7 March 2016 (UTC)
 * Hard to put "typical" values in because reference weenies will pounce. Physical size depends on current rating and working voltage as much as inductance values. You'd expect "microhenry" values in the tuned circuits of radio-frequency circuits, but the field of a large DC motor might be many henrys. --Wtshymanski (talk) 02:30, 11 March 2016 (UTC)