This is an old revision of this page, as edited by Light current (talk | contribs) at 07:24, 1 August 2005. The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.
Revision as of 07:24, 1 August 2005 by Light current (talk | contribs)(diff) ← Previous revision | Latest revision (diff) | Newer revision → (diff)Bold textI think that a color code for resistors should be included and not linked to.
"Resistance is proportional to cross-sectional area and to the material's resistivity, a physical property of the molecules that comprise the resistor. Resistance is inversely proportional to the length of the resistor."
Shouldn't it rather be:
"Resistance is inversely proportional to cross-sectional area and proportional to the material's resistivity, a physical property of the molecules that comprise the resistor. Resistance is proportional to the length of the resistor."?
S.
Yes, it should. If you find such errors again, Be bold in updating pages! Andre Engels
the resistance between the wiper and one end terminal is proportional to the logarithm of the distance between them.
- probably the distance is the logarithm of the resistance! Patrick 11:23 Oct 29, 2002 (UTC)
"There is even a system that uses a photoelectric sensor "reading" the optical density of a piece of film. Since the sensor does not touch the film, no wear is possible."
so in other words, it's not a resistor, and shouldnt be in this article listed as one. right? Omegatron 20:28, Feb 26, 2004 (UTC)
why is \mathbf added to the lower resistor calculation? It makes the two look different, as the first R in the bottom is no longer italic (and the equation is uglier). Aren't the PNGs the same for every browser? I don't see how this could look consistent to one person and not consistent to me... - Omegatron
- The R should have been bolded for both of them as Req stands for "equivilent resistance". Perl 22:25, 9 Mar 2004 (UTC)
cross sectional area and resistance
removed for verification:
(Additional note: There are two reasons why a small cross-section area tends to raise resistance. One is that the electrons, all having the same negative charge, repel each other. Thus there is resistance to many being forced into a small space. The other reason is that the electrons collide with each other, causing "scattering," and therefore they are diverted from their original directions. More discussion is on page 27 of "Industrial Electronics," by D. J. Shanefield, Noyes Publications, Boston, 2001.)
I am not sure the repelling of electrons has anything to do with resistance, though I could be wrong. Wouldn't that affect thing like superconductors, though? Similarly, electron "collisions" wouldn't seem to affect anything, since electron motion is pretty much random, and only the net flow of electrons or the electric field wave is really important... - Omegatron 16:46, Dec 9, 2004 (UTC)
what should be fixed
I know nothing about resistors. I was trying to learn. YOU DO NOT SAY WHAT A RESISTOR ACTUALLY CAN BE USED FOR! you say what it does, but not why that is useful at all. thanks!
- Resistors are used for a LOT of things. Pretty much every electrical circuit uses resistors for one purpose or another. The simplest application I can think of would be something like a light dimmer. If you put a high-power resistor in series with a light bulb, you can dim the light bulb, because the resistor converts some of the electrical power into heat, leaving less power for the light bulb. Help at all? - Omegatron 20:01, Feb 10, 2005 (UTC)
Mnemonics on remembering resistor color codes
Someone add the following mnemonic sayings to the page:
Bad Beer Rots Our Young Guts But Vodka Goes Well. Get Some Now!
B.B. ROY of Great Britain had a Very Good Wife
Buffalo Bill Roamed Over Yellow Grass Because Vistas Grand Were God's Sanctuary
--195.225.129.1 18:07, 28 Feb 2005 (UTC)
Resistor series
There are series of resistor values, namely E6, E12, E24 - these have a geometric sequence relation to each other in their resistance value, take a look at preferred number to see what I mean. According to that article, International standard IEC 63 defines those values.
--Abdull 15:20, 19 Jun 2005 (UTC)
Resistance of a True Vacuum
I always thought that a true (ideal) vacuum would have an INFINITE resistance. Am I Wrong? ?. If not, this reference should be deleted. Al
RESISTANCE of CONDUCTORS NOT APPROPRIATE
This article is about RESISTORS so I have removed the bit about resistance of CONDUCTORS. This is better put under the article on resistanceLight current 07:24, 1 August 2005 (UTC)