![]() | This ![]() It is of interest to the following WikiProjects: | ||||||||||||||||||||
|
Shouldn't the introduction say what a resistor does in respect of its broader purpose?
I tried! Using the word "philosophical", while probably accurate, is likely to raise a red flag to technical people. It took me a few decades to figure out, in a more-general sense, what resistors generally do in electronics. They "scale current" -- establish its value, or else scale the relationship between voltage and current, but the latter is too messy to try to analogize. Nikevich ( talk) 09:08, 20 February 2009 (UTC)
—Preceding unsigned comment added by 217.36.232.61 ( talk) 09:17, 18 June 2008 (UTC)
I've just found something really interesting (at least for me). Did you ever see 0 Ω resistor? I just found it a few days ago and can't figure out what is its purpose. Can someone maybe tell me what could be its use? (the instrument is showing around 0,2 Ω but it is resistance from the instrument alone...) If someone does not trust me - he can see the pictures that I just took.
and
Yes, "Zero-ohms" are nothing magical and therefore do have a small resistance. They are used to connect two parts of a pathway on a printed circuit-board, when one pathway for some reason had to be cut in two (e.g. becuase of another pathway crossing its way). As they are "like" a normal resistor, they can be inserted by the same machines used to insert, cut and solder a normal resistor. You could just as easily used a thin (isolated, if board had paths on both sides) piece of wire to connect the two halves, but then you'd probably have to insert it manually... besides, the zero-ohms looks good. Koppe
What about a section about 'Contact Resistance'?
I'll be thinking about that! Nikevich ( talk) 09:08, 20 February 2009 (UTC)
There needs to be something on star and delta resistor configurations, or is it elsewhere?
I 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.
"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
I'm relatively new to electronics (and to editing wikipedia). I came to this page looking for help on understanding the color code system for indicating resistor values. I found the section here on that topic a little vague. From reading it, I don't know in what direction I'm supposed to read the bands, and I can't quite picture how the whole system would work. I think an example or two (along the lines of what's on this page) would have been helpful (especially if some actual photographic examples were included.
Thanks!
-- atduskgreg
I just added a couple of sentences or so; basically, start at the end, and read toward the center. Nikevich ( talk) 09:08, 20 February 2009 (UTC)
-- The gold silver etc is the last band the "normal" colours are first. wolfmankurd
--- I think the article can use more technical info relative to high frequency and power/surge overload performance. In addition, should include more regarding Mil-specs, EIA stds, resistor networks, and a brief listing of major mfrs. I added in a couple of popular mil-specs but didn't want to invest much time w/o first getting a general consensus. AerospaceEngr 21:21, 28 August 2007 (UTC)
High-frequency performance? Would be nice to give more detail about what you have in mind. Plainly, resistors with leads aren't for microwave use, and wirewounds typically have significant stray inductance; helix-cut elements do, also. As to power and surges, low-mass (thin film) elements probably are quite poor for withstanding short-term overloads, but I don't know enough to write some text on that. Good thoughts! Nikevich ( talk) 09:08, 20 February 2009 (UTC)
I added a significant amount of material, although the text as I found it was so good I left it mostly untouched, or made only quite-minor edits. Unfortunately, I previewed numerous times, so the Changes display is somewhat misleading. (The Change display algorithm made it look as though I had deleted some original text; don't panic -- it is still there!)
I added a lot of HTML code to the color-code table to make text [more] readable. (Curious that this didn't seem to be proofread, or do different browsers have different scope for [font color] tags in a table?) (Am using Firefox for editing). That was a labor of love; part way through, I "wised up" and used copy and paste. Nevertheless, lots of Previewing.
We probably should include carbon-pile compression-type variable resistors. (I'm running out of energy.)
Trivia: An early 20th century radio rheostat had a rotating wirewound resistance element and a fixed wiper spring. Nikevich ( talk) 09:08, 20 February 2009 (UTC)
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)
Actually it does, especially when high frequency AC is used. It's called "skin effect". — Preceding unsigned comment added by 79.127.150.131 ( talk) 19:19, 27 July 2011 (UTC)
This is frustrating:
Power dissipation
The power dissipated by a resistor (or the equivalent resistance of a resistor network) is calculated using the following: P = I^2 R = I V = \frac{V^2}{R}
All three equations are equivalent. The first is derived from Joule's first law. Ohm’s Law derives the other two from that.
The total amount of heat energy released is the integral of the power over time:
W = \int_{t_1}^{t_2} v(t) i(t)\, dt.
If the average power dissipated is more than the resistor can safely dissipate, the resistor may depart from its nominal resistance and may become damaged by overheating. Excessive power dissipation may raise the temperature of the resistor to a point where it burns out, which could cause a fire in adjacent components and materials. There are flameproof resistors that fail (open circuit) before they overheat dangerously.
OK what do the values mean? and when are the components of the equations going to be defined - so that people who do not know what they mean, can use them? —Preceding
unsigned comment added by
210.1.214.106 (
talk) 03:43, 25 October 2010 (UTC)
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!
I agree with the above, I think someone who didn't know anything about what a resistor was would be very confused trying to learn it from this article. After the first paragraph, it goes right to "identifying resistors". I think it would be better to show something like an example of a simple circuit with voltages labled at different points, and maybe some simple explanation of why resistors are useful in the real world. Also, it seems like the Ohm's law reference in the first sentence, arranged to start with "R =", kind of makes it seem like the resistance of a resistor is determined by the voltage and current, and maybe that the device is "magically" constructed to follow that law. Since the sentence reads "by producing a voltage drop" maybe the equation should just be written as "V = IR"
71.233.240.242 (
talk) 16:17, 30 January 2008 (UTC)
That "philosophical" addition (it might be gone by the time you read this!) referred to what's inside electronic circuits; indeed, crude light dimmers, or old sewing-machine speed controls, don't match that concept. Nikevich ( talk) 10:22, 20 February 2009 (UTC)
Black Brown Red Orange Yellow Green Blue Violet Gray White (Gold Silver)
-- 195.225.129.1 18:07, 28 Feb 2005 (UTC)
I find that some of the mnemonics are not appropriate. Such as "Black Boys Rape our Young Girls ...". People may use this to remember the colours, but the wiki should not promote and encourage the use of these mnemonics. They should be removed.
I did. Nikevich ( talk) 10:22, 20 February 2009 (UTC)
Being three score and thirteen in age, I do wonder whether kids learn the colors of the rainbow in sequence; that easily takes care of red through violet. (Indigo was dropped from the traditional sequence probably before World War I.)
Eventually, a technician would not need to think; a red-red-yellow is a 220 kohm resistor.
Should this be removed from the Talk page, as well? I removed one such, above. Unfortunately, this was informally taught in the Navy electronic tech (ET) and fire control tech (FT) schools in the 1950s. Nikevich ( talk) 10:22, 20 February 2009 (UTC)
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)
I always thought that a true (ideal) vacuum would have an INFINITE resistance. Am I Wrong? ?. If not, this reference should be deleted. Light current 15:26, 3 August 2005 (UTC)
This article is about RESISTORS so I have removed the bit about resistance of CONDUCTORS. This is better put under the article on resistance Light current 07:24, 1 August 2005 (UTC)
It has more free electrons. Greeshsah ( talk) 06:42, 9 December 2016 (UTC)
In other languages (see the German or Italian article), the symbol for a resistor is a rectangular box. This page claims that this is also true in the UK.
Is there some sort of international standard concerning these symbols and should this page reflect other internationally used symbols? Kusma 00:51, 21 October 2005 (UTC)
It is the rectangle box in NZ also. I think the zig zag line in the North American symbol and the box is the symbol for pretty much everywhere else. -- antilived T | C 03:34, 28 November 2005 (UTC)
The rectangular box is the standard symbol for all components, to be a resistor it must have an R, similarly inductors have L, capacitors C, impedences Z. FrstFrs 21:10, 30 January 2007 (UTC)
Afaik, in industrial electrical (not electronic) schematics in the USA, the rectangular block was used for a resistor. Several other symbols (such as contacts) differed from those used for electronic schematics. Nikevich ( talk) 10:22, 20 February 2009 (UTC)
Instead of whining like children, can someone explain why there are two different symbols? Who decided it was better to use boxes/rectangles and why? I can see the resistance (pun intended) to using boxes not because of international preference but simply because it is easier to draw by hand. When drawing schematics by hand, a zig-zag is much easier to draw as the writing utensil does no have to be lifted from the paper and the motion is in one direction. A rectangle would mean the drawing of the line would be interrupted, a rectangle be drawn and then continue the line. Imagine drawing by hand a largish voltage divider network or a diagram where multiple resistors need to be drawn in series for clarity. One could easily run a pen down the paper scribbling out the zig zag shaped resistor symbols in a matter of a second or two. A zig-zag is much easier and neater to draw and cannot be mistaken for any other device. I am unaware of any other electronic symbol that uses a zig zag save for a resistance type heating element which is in fact a resistor. Anyone care to chime in and help explain the reason rectangles exist? Thaddeusw ( talk) 14:24, 17 May 2011 (UTC)
I am in the process of disambiguating the Power disambiguation page. This means I find links to Power, and try to figure out which of the several power related articles were really intended. This artice contains a link to Power which should actually be a link to Power rating. Since the page is protected, I request that someone with authority to edit the page make the improvement. Gerry Ashton 20:24, 25 May 2006 (UTC)
First off, if I have used the template above incorrectly please let me know...
The second sentence has the redundancy ""... divided by the current that is flowing through the resistor."" It should read sans "that is flowing" and be simply ""... divided by the current through the resistor.""
Again the second sentence under "The idea resistor"; "... remains constant regardless of the applied voltage or current flowing through the device." Should be written w/o 'flowing'
The last sentence prior to "Power dissipation" also contains this error "...break down and admit a larger flow of current under sufficiently high voltage." w/o 'flow of'.
Those are the only three that I found, there seem to be many more correct usages than incorrect. Thank you Admins for your attention... ~-- Ketter 02:09, 4 June 2006 (UTC)
Not sure if it's accurate, but I remember from one of my schoolbooks a chart showing how the background-color of a resistor (the typical kind with color-rings to show value) corresponded with the material used. E.g. white=carbon-film, blue=some metal-oxide (can't remember, it's been 15 years :-). If someone had such a table (and if resistors are still coded this way), it would be a great addition to this page. -- koppe 10:00, 6 July 2006 (CET)
Background color isn't used anymore although most mfrs have standardized on tan for carbon film & blue for metal film. Most metal oxides are gray but some are light blue, green, or violet. AerospaceEngr 16:49, 22 August 2007 (UTC)
Why is power(electric) transmitted at high voltage when power loss due to ohmic heating is V2/R as well as I2R? Why does the ohmic loss decrease with increase in the amplitude of the voltage(Of AC)? Subhash
Thank you. Subhash
"The Standard EIA Color Code Table per EIA-RS-279 is as follows:
black=1 brown=2 red=3 orange=4 yellow=5 greem=6 blue=7"
This is in error and is incomplete: Green is misspelled; more importantly, the numbers are off by 1. It should read:
black=0 brown=1 red=2 orange=3 yellow=4 green=5 blue=6 violet=7 grey=8 white=9
As per any number of online references. Precision resistors are often confusing to the novice and even to some experienced people. Additional color bands will indicate more information such as much tighter tolerances and temperature coefficient, though these types are not often seen by most users. In practice, the tiny size of the bands and their precise coloring can be difficult to discern; I'm having to use a magnifying glass these days!
--Damon Hill, [email protected]
I am reading this page 13 Feb 2007. It has been vandalized again. Unfortunately... I do not know enough about the subject to correct it. -- 71.170.63.164 04:01, 14 February 2007 (UTC)
As the topic of Resistor is a vital element in the field of Electronics the page must include basic science information about what the device is in terms of applied materials physics and materials chemistry. When I add this knowledge it is deleted "as a cut and past" actually no. It was, however, free hand from my head and my deep understanding and research, (So adopt me if the style is not good enough for the page, and I will comply. Or if you need references thats OK too...) I do feel some representation of the Materials Science / Applied Physics is appropriate if you also have a Technology section that lists varios "material based" resistive schemes. As the simple Man made color coding and material composit choices to make a resitor are interesting for a hobbiest, it in no way defines 'what' a resistor is in natural terms. To be more concise the terms to define a resistor should not be by the word resistor or some ratio relative to other properties of electron resistance through a material. To be a vital representation; the atomic understandings as of 'today' of the electron in a material needs to be expressed here 'as a free charge carrier' in the conduction band of the material for a deeper understanding for all, than just man made constructs describing man made elements. Some may have expressed recent additions as cut and past and reverted the post (A1 to bad), others may have seen the possibility for expansion with citation into material science and physics to provide more depth of understanding for others... In any case my post was not cut and past, its from 20 years in the field and trying to boil the facts down for others to have a clearer understanding of what a "resistor" is in electronics by documented research in the field of Electronic Devices and Materials. Insert non-formatted text here
Need a reference to a standard for the given temperature ranges. I've tried looking online, but so far unsuccessful. I've seen a couple different temperature specifications: Commercial, Industrial, Extended, Automotive, Military. There is one JEDEC source, but it doesn't specifically mention the above labels. [1].-- 64.253.147.99 ( talk) 20:24, 29 August 2008 (UTC)
Hello,
I rolledback a potential copyvio diff based upon a matching text found here. It is unclear which way the violation goes -- looking through their website I have been unable to determine it concretely. User A1 ( talk) 02:40, 31 August 2008 (UTC)
We all know that potential difference V=I(current)/R(resistance)
so, I=V/R
Just imagine a 1 volt potential difference & 0 Ώ(ohm) resistance....i.e.....
I=1/0='INFINITY'
That means current supplied will be infinite amount.......check it out ...how wonderful & amazing!!!!!!!! - Rana Jose(e-mail: [email protected]) —Preceding unsigned comment added by Ranajose ( talk • contribs) 08:36, 2 November 2008 (UTC)
I have come across a 5-band resistor with the following color code: red-violet-gold-gold-yellow. The value of this resistor is marked 2.7 ohms in my schematic. I understand if there is a gold 4th band in a 5-band resistor, but a 3rd and 4th gold band? It is an older resisor, so the yellow 5th band is likely a TempCo of 25 ppm. So I would assume that red-violet=27, gold=0.1, so that gives me a value of 2.7 with +/-5% tolerance with a TempCo of 25ppm. Correct? —Preceding unsigned comment added by Negative1331 ( talk • contribs) 20:41, 12 February 2009 (UTC)
A newbie editor has just created Radial- lead. Would someone please check if it can be merged in here? Thanks. -- Fullstop ( talk) 01:58, 25 February 2009 (UTC)
This is a much too large subject to adequately cover in one WP article. And many important aspects have not been broken off into associated articles. Inadequate coverage of history. No coverage of major manufacturers and their histories.
Too brief coverage of power resistors, which probably need a separate article for expansion. No mention of major historic makers: Dale, IRC (International Resistive Company), Ohmite etc, and what has become of them.
Here is some more history that belongs somewhere:
The vacuum tube equipment that was typical up until the 1950s and 60s typically used mostly 1/2- and 1-watt carbon composition resistors, 20% and 10%. As transistors and then IC circuitry came into use in the 1950s and 60s, smaller 1/4- and 1/2-watt carbon composition 5% resistors became the most common, to save space, because the power levels were lower, and greater accuracy became more feasible to achieve economically. Through-hole circuit construction dominated into the 1970s, after which surface-mounted construction started taking over commercial mass production, calling for surface-mounted resistors and ever shrinking sizes, to save space and facilitate increased density. The older resistor types were used in circuits that were assembled by hand. PCBs were at first assembled by hand, then with increasing robotic automation. The newer smaller surface-mount types are usually assembled be completely automated equipment. Many modern parts are so small that it is very hard to work with them by hand. - 71.174.175.104 ( talk) 22:21, 1 July 2009 (UTC)
User:Uriburi has been edit-warring, adding a section about the history of the foil resistor. The most immediate response is that the English used is impossible to read because it is poorly translated from another language. The second, more measured response is that the information, if put into this article, will put foil resistors out of balance with all the other kinds of resistors, because none of them have history sections. What is needed is for this information to flesh out an article about foil resistors, and we'll link to it from here in this manner:
Okay? Binksternet ( talk) 21:34, 28 August 2009 (UTC)
resistor is a passive elements in which it opposese the voltage and current according to the ohms law —Preceding unsigned comment added by 122.172.21.51 ( talk) 15:00, 4 March 2010 (UTC)
I think user Prari has a point with this deletion and it should have been discussed rather than go into edit war mode and restore it twice. The edits all seem to have been with the sole purpose of working in refs to Vishay rather than actually improving the article. The edit summary of "rv inane, ignorantly worded and misplaced text which originally accompanied Vishay linkspam" is not exactly civil, but come on, does "Because of the expense these resistors tend to be used in power supplies and welding controls" actually mean anything? Expense has never been a reason for using anything in the electroncs world. SpinningSpark 17:17, 16 May 2010 (UTC)
This isn't a real important article for me, but I'd be happy to rewrite major portions of the lede if no one else (who may have been more involved with this article) acts or expresses disagreement with my concerns.
"The primary characteristics of a resistor are the resistance, the tolerance, the maximum working voltage and the power rating. "
This is a bit misleading since the main characteristic of importance, often the only characteristic of interest, is the resistance itself. The tolerance isn't a characteristic of the resistor but rather a statement regarding the labeling of its resistance (how accurate the stated resistance is). The maximum voltage and power dissipation can be very important in certain cases, but the vast majority of resistors are used in electronic circuitry to process signals (not a power circuit) where these limits are of no concern.
"Less well-known is critical resistance"
Referring back to the beginning of the paragraph concerning the "characteristics of A resistor," this couldn't possibly be one of them. It is rather a characteristic of a particular resistor technology and form factor. It doesn't even belong in the lede (nor do most of the other "characteristics" IMO).
I may go ahead and make a major edit to this section. If you really don't like it, revert and discuss here in detail your concerns. Interferometrist ( talk) 18:08, 27 January 2011 (UTC)
The primary characteristic of a resistor is its resistance. When specifying a resistor, concern with the precision of its resistance may require attention to the manufacturing tolerance applying to that resistance, depending on its specific application. Particularly in power applications, the maximum power dissipation of a resistor will often be of importance, as will the maximum working voltage in high voltage circuits. Resistors with higher power ratings are physically larger and may require heat sinking.
The temperature coefficient of the resistance will be of concern in some precision applications. In a low-noise amplifier or pre-amp the noise characteristics of a resistor may be an issue. The series inductance of a resistor can be important in some high-frequency applications for smaller values of resistance. The latter three characteristics are generally dependent on the technology used in manufacturing the resistor. They are not normally specified individually for a class of resistors manufactured using a particular technology.
Interferometrist ( talk) 20:07, 27 January 2011 (UTC)
Ok, guys, there is a big mess int the lede. I think that there is to much irrelevant issues put there, like talk about tolerance etc. If somebody is about to rewrite that part, I'd like to add a contribution. We can agree who would start doing that. Ercegovac ( talk) 21:57, 22 July 2011 (UTC)
Please, Wtshymanski, let's make this better, not just revert to something that you might have once thought was fine. You say "longer isn't better" I guess because what I wrote is longer (in order to be clear and useful to a person not in the field of electronics). Do you want me to write something shorter? That's possible, although the lede isn't particularly long in relation to this very LONG and ELABORATED article. I don't like what you reverted to: "A resistor ... produces a voltage (V) across its terminals" which I think would be misleading as it could be read (by someone outside of electronics) as meaning that a resistor produces power, which of course is the opposite of what a resistor does: consumes power. Most people think of constant voltage circuits (mains, batteries) so the I=V/R form of ohms law is the most appropriate. I made it LONGER by INCLUDING the V=IR form as well, but I'd be alright with removing that, if you REALLY think it's becoming too long (but I don't). Interferometrist ( talk) 21:34, 27 January 2011 (UTC)
A resistor is a two- terminal electronic component whose primary characteristic is that it presents electrical resistance between its two terminals in order to implement that component of a circuit. When a voltage V is applied across the terminals of a resistor, then a current I will flow through the resistor in direct proportion to that voltage. The reciprocal of the constant of proportionality is known as the resistance R, since, with a given voltage V, a larger value of R further "resists" the flow of current as given by Ohm's law:
Interferometrist ( talk) 21:45, 27 January 2011 (UTC)
The comment (seemingly unrelated to the edit!) by Binksternet is extremely misleading:
I have no idea what this reference might have been thinking, or more to the point, the context in which they (may have) said that "wattage" (maximum power dissipation) is the primary characteristic of a resistor, but that statement as quoted out of context is rather ridiculous! Of course the resistance itself is the most important and the "wattage" is also extremely important in the cases WHERE IT IS OR MIGHT BE EXCEEDED. In signal electronics, in 99% of cases, the power rating doesn't even need to be thought about. Anyway, if no one here wants to discuss further the issues I have been trying to discuss in the previous 2 sections, I will go ahead and make edits which I am sure are justified, but taking into account all of the specific suggestions that have so far been posted (such as "longer isn't better", and the relatively greater importance of the power rating in power electronics circuits). Interferometrist ( talk) 22:36, 27 January 2011 (UTC)
Anyway, I edited the section very carefully to reflect the specifications applying to practical resistors (as they would be specified by the engineer or listed in a catalog) giving proper weight to the various specs, only two of which (inductance and excess noise) involve non-ideal behaviour (the others are limitations). And I put the explanation of "critical resistance" (never specified in a catalog but easy to compute: Rcrit = Vmax^2 / Pmax) in a footnote. If still any disagreements, please post them on this talk page. Thanks, Interferometrist ( talk) 12:09, 28 January 2011 (UTC)
I've got about 50 open windows myself, so yes I understand! But now I'm confused about what is in the Middleton and Valkenburg reference which I don't have a copy of: I had thought that it defined "critical resistance" since that had been an issue (but a very obscure parameter, not applying to an individual resistor, and not appropriate in the lede so I relegated it to a footnote. If someone wants to delete the footnote altogether I'd hardly object.). In any case, the latest changes I made reflects the fact that the main characteristic of an individual resistor is simply the resistance itself, just as Middleton and Valkenburg say on the pages you mention. This is much better than a laundry list of parameters which could possibly be specified in a catalog, or treating "tolerance" and "temperature coefficient" as special qualities rather than simply as stipulations regarding what the actual resistance will or might be for a particular part number at a particular temperature. I hope we all agree now :-) Interferometrist ( talk) 14:20, 28 January 2011 (UTC) Whoops, I got that wrong: you are saying that Middleton and Valkenburg do NOT mention that the value of resistance is the main parameter of a resistor (but I'm sure they would say so if you asked them specifically!). In any case the issue is not in question, I'm just not sure who says it where! Interferometrist ( talk) 14:33, 28 January 2011 (UTC)
In the section referring to parallel resistors, The resistance of N resistors connected in parallel, each of the same resistance R, is given by R/N. Shouldn't it be N/R (as N*(1/R))? I have changed it, though I am wrong, please correct me (and explain why I am wrong). 203.153.39.18 ( talk) 14:00, 12 January 2012 (UTC)
We need a photo of some power resistors, not titchy little electronics resistors. Does anyone out there have access to, oh, say, a grounding resistor for a medium voltage distribution system, or a dynamic braking bank for a hoist drive, an old-time wound-rotor motor drive, a load bank for generator testing? Not all resistors come in blister packs at Radio Shack. -- Wtshymanski ( talk) 22:03, 8 March 2012 (UTC)
So, uh, what exactly is a resistor FOR? What is its FUNCTION? Shouldn't that be spelled out SOMEPLACE in the article???? — Preceding unsigned comment added by 174.70.58.119 ( talk) 21:12, 2 May 2012 (UTC)
I am unsure in the logic for deletion. If there is a desire to not inform the user on practical methods of solving issues then why not remove those sentences? An entire deletion seems a bit overkill. Still, unsure why we should not include this information a resistor is a practical part and this information would have been of great help to me in my earlier career
173.52.114.254 ( talk) 23:57, 6 August 2012 (UTC)
There is no reference to a carbon pile resistor in the article. From my limited understanding it is a type of variable resistor, that i assume, reduces in resistance as pressure is applied to a 'pile'(stack?) of individual carbon elements. 79.66.209.200 ( talk) 12:20, 23 October 2012 (UTC)
Please see the corresponding discussion thread at Wikipedia talk:WikiProject Electronics. Thanks! • Sbmeirow • Talk • 23:34, 15 December 2013 (UTC)
If anyone wonders why I added the resistor symbol caption in such an odd way, please read this suggestion:
Template_talk:Infobox_electronic_component#Symbol_caption
Anonimski ( talk) 16:46, 28 January 2014 (UTC)
This article needs a section about resistor arrays / networks; including talk about surface mount (convex, concave), SIP through-hole, DIP through-hole, other surface mount types; types of array / network diagrams including schematic examples. 98.164.0.184 ( talk) 01:34, 26 March 2016 (UTC)
Could not found the definition of resistor's tolerance in Wikipedia. Is it a measurement of extra-load that the resistor can "tolerate" ? or it is a measurement of "deviation" of resistance than expected? Is it only the property of a resistor? if tolerance is also property of other components (capacitors, inductors, batteries etc), there should be a separate page on tolerance. RIT RAJARSHI ( talk) 12:25, 23 June 2016 (UTC)
I wonder if this article would benefit from a section about uses of resistors? Uses are a large part of the lede section but not treated much in the body of the article. I would also include then alternatives to resistors for some uses, such as other methods of current limiting that don't waste some of the energy as heat, for example in the way that modern LED controllers or dimmers work. Thoughts on this from people who are active on this article? SageRad ( talk) 15:22, 9 September 2016 (UTC)
What is thermistor made of ? Greeshsah ( talk) 06:44, 9 December 2016 (UTC)
This section was added by Special:Contributions/Stammitreg, an apparent SPA. I've copy edited the section in hope of clarifying it, and reducing peacock language about the device's inventor. Suggestions and complaints can go here... Just plain Bill ( talk) 21:34, 4 April 2019 (UTC)
![]() | This
edit request has been answered. Set the |answered= or |ans= parameter to no to reactivate your request. |
I would like to add information about all the other types of the resistors and their uses, which can be really helpful to others. Electroniclinic ( talk) 12:51, 23 May 2020 (UTC)
Could we add a separate History section just to cover the development of resistor technology from the 19th to 21st centuries? Ordinary Person ( talk) 09:12, 10 August 2020 (UTC)
Greetings Wikipedians! I commend all the contributors for their efforts. The Ohms Law and Power Dissipation subsections lack inline citations to reliable sources. This violates Wikipedia's policy on verifiability (set forth here: Wikipedia policy on verifiability), which states: "Even if you are sure something is true, it must be verifiable before you can add it....The burden to demonstrate verifiability lies with the editor who adds or restores material, and it is satisfied by providing an inline citation to a reliable source that directly supports the contribution." I hope someone will step forward to remedy this problem. Unsourced material is subject to being removed, but hopefully that will not be necessary. Cordially, BuzzWeiser196 ( talk) 11:28, 6 July 2021 (UTC)
This article needs additional citations for
verification. (July 2021) |
I added an inline reference (ARRL Handbook chapter) for the different resistance units. It may not be needed but it's easy enough to add. I also added a ref for maximum voltage. I think the other requests for citation are legit.--[[User:ArnoldReinhold|agr]] ( talk) 15:41, 6 July 2021 (UTC)
This article was the subject of a Wiki Education Foundation-supported course assignment, between 18 January 2022 and 10 May 2022. Further details are available
on the course page. Student editor(s):
YehLikeJazz? (
article contribs).
Hello All. I am new to the editing side of WP, and I am open to being corrected if there is anyone keeping up with this article who thinks I am wrong. I think it would be a good idea to condense the sections on different types of resistors and start an article to list the different types. I am not suggesting to get rid of them entirely, just bring it in a little. I think this could give room to expand freely on the different types (who's applications to different fields seems to vary, but maybe the new article could reflect the different application more clearly than could a list of all resistors nestled into a long article about resistors?) and also free up this article to stay more general, hit the main points about the main ones, acknowledge some of the more obscure ones, and just overall look more tidy. There are handful of more minor edits I think would work well (some restructuring in the lead, swapping out a photo, readablity), but I wanted to see if this one really big change would meet some push-back/ generate alternatives first. YehLikeJazz? ( talk) 06:31, 25 February 2022 (UTC)
Hello. I know that if this is something the community does not want it will end up getting deleted, but I created a page, List of resistors, for listing out different types of resistors and made room for some that were left out of this article. It may need some rearranging and it does not have every type listed yet, but it's a start. It might be a good idea to consolidate some of the types of resistors information on this page but I do not feel like I should be the one to do that. I am new to wiki-editing and fairly new to electronics as well. — Preceding unsigned comment added by YehLikeJazz? ( talk • contribs) 23:00, 20 March 2022 (UTC)