→Capacitors for storing charge or not: It is used in authoritative sources |
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::I agree. A capacitor stores charge: one plate stores positive charge and the other stores negative charge. Even if the phrase doesn't tell the whole story, its as good a capsule description as we're going to get, which is why it is used widely as a definition in "authoritative sources": [http://www.thefreedictionary.com/capacitor 1], [http://books.google.com/books?id=16Aec25Fo_0C&pg=PA530&dq=capacitor+definition&hl=en&ei=PmeaTf2VFKHi0gGuuuSJDA&sa=X&oi=book_result&ct=result&resnum=8&ved=0CF0Q6AEwBw#v=onepage&q=capacitor%20definition&f=false 2] [http://books.google.com/books?id=1DZz341Pp50C&pg=PA657&dq=capacitor+definition&hl=en&ei=pmiaTabiA5Oz0QH73tSBDA&sa=X&oi=book_result&ct=result&resnum=9&ved=0CGEQ6AEwCDgU#v=onepage&q=capacitor%20definition&f=false 3] [http://books.google.com/books?id=CxDoh68BhwcC&pg=PA71&dq=capacitor+definition&hl=en&ei=K2maTYfgKMK20QGlo53BBg&sa=X&oi=book_result&ct=result&resnum=9&ved=0CGcQ6AEwCDge#v=onepage&q=capacitor%20definition&f=false 4] [http://books.google.com/books?id=GvdclZGduiMC&pg=PA92&dq=capacitor+definition&hl=en&ei=ZWyaTYTxEsmI0QHS8YnFBg&sa=X&oi=book_result&ct=result&resnum=5&ved=0CEwQ6AEwBDha#v=onepage&q=capacitor%20definition&f=false 5] Excessively complicated, esoteric introductory sentences are one reason people complain Wikipedia articles can only be understood by the people who wrote them. --<font color="blue">[[User:Chetvorno|Chetvorno]]</font><sup>''<small>[[User talk:Chetvorno|<font color="Purple">TALK</font>]]</small>''</sup> 01:27, 5 April 2011 (UTC) |
::I agree. A capacitor stores charge: one plate stores positive charge and the other stores negative charge. Even if the phrase doesn't tell the whole story, its as good a capsule description as we're going to get, which is why it is used widely as a definition in "authoritative sources": [http://www.thefreedictionary.com/capacitor 1], [http://books.google.com/books?id=16Aec25Fo_0C&pg=PA530&dq=capacitor+definition&hl=en&ei=PmeaTf2VFKHi0gGuuuSJDA&sa=X&oi=book_result&ct=result&resnum=8&ved=0CF0Q6AEwBw#v=onepage&q=capacitor%20definition&f=false 2] [http://books.google.com/books?id=1DZz341Pp50C&pg=PA657&dq=capacitor+definition&hl=en&ei=pmiaTabiA5Oz0QH73tSBDA&sa=X&oi=book_result&ct=result&resnum=9&ved=0CGEQ6AEwCDgU#v=onepage&q=capacitor%20definition&f=false 3] [http://books.google.com/books?id=CxDoh68BhwcC&pg=PA71&dq=capacitor+definition&hl=en&ei=K2maTYfgKMK20QGlo53BBg&sa=X&oi=book_result&ct=result&resnum=9&ved=0CGcQ6AEwCDge#v=onepage&q=capacitor%20definition&f=false 4] [http://books.google.com/books?id=GvdclZGduiMC&pg=PA92&dq=capacitor+definition&hl=en&ei=ZWyaTYTxEsmI0QHS8YnFBg&sa=X&oi=book_result&ct=result&resnum=5&ved=0CEwQ6AEwBDha#v=onepage&q=capacitor%20definition&f=false 5] Excessively complicated, esoteric introductory sentences are one reason people complain Wikipedia articles can only be understood by the people who wrote them. --<font color="blue">[[User:Chetvorno|Chetvorno]]</font><sup>''<small>[[User talk:Chetvorno|<font color="Purple">TALK</font>]]</small>''</sup> 01:27, 5 April 2011 (UTC) |
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::: To reiterate: a capacitor stores charge, but then so does a wire, a brick, a human-being...anything containing charged particles. A capacitor is not <i>for</i> storing charge; a capacitor is for storing a certain configuration of charge - a charge separation. Compare this to a steel spring, which likewise stores steel (in that it contains steel), but is <i>for</i> storing steel in a specific configuration (compressed or stretched). [[Special:Contributions/86.148.115.162|86.148.115.162]] ([[User talk:86.148.115.162|talk]]) 05:43, 5 April 2011 (UTC) |
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Picture
Why does the picture have a direction for V? — Preceding unsigned comment added by Schilippe (talk • contribs) 04:47, 30 March 2011 (UTC)
Condenser
My father was an amateur radio operator (Ham) who studied electronics at a radio college in Toronto, Ontario in the mid-1930s. He built his own transmitters, and did radio repair for many years. He always used the term "condenser". I remember that well from my childhood in the 1960s: he never ever referred to condensers as capacitors even into the 70s or 80s. When did the name change to capacitor "officially" happen? —Preceding unsigned comment added by 68.71.8.39 (talk) 12:41, 6 January 2011 (UTC)
Who coined the term "battery" ?
Multiple references attribute the first usage of the term "battery", when applied to a group of Leyden jars, to Benjamin Franklin. Some references attribute it to Daniel Gralath. We have a letter from Franklin himself, dated 1748, in which he states, "Upon this we made what we called an electrical-battery".(ref, page 28) I haven't found any reference illustrating Daniel Gralath using this term at a date which precedes Franklin's letter. If no such reference exists, I would give Franklin the benefit of the doubt for having coined the term. A recent edit to the article changed the wording from created to adopted, and I question the historical validity of this change. Wildbear (talk) 06:04, 9 July 2010 (UTC)
- I agree. Maybe I'm biased toward my own text, but I don't think that copyedit improved much. It now also suggests that using plates is somehow obsolete. Support undoing it. Potatoswatter (talk) 06:21, 9 July 2010 (UTC)
Electrolytic capacitor explosions
The article currently states that high-voltage electrolytic capacitors can explode if exposed to voltage beyond their rated limit. It does not have to be just high-voltage capacitors. When I was in high school, some one apply 20V across a capacitor rated for only 16V. It went bang spectacularly.
I am going to remove the "High-voltage" part from this line.
Nutster (talk) 05:46, 22 March 2011 (UTC)
- I think the point was that high-voltage capacitors pose a particular safety issue. In a low-power electronic application, sure, it is possible for capacitors to explode but it is not a serious matter when it happens and it does not happen often because capacitor voltage ratings are often many times the working voltage (the exception is tantalum capacitors which have comparatively low voltage ratings and when they go make a repulsive smell to boot). On the other hand workers testing high-voltage power supplies can be required wear safety goggles to protect their eyes in the event of a reservoir capacitor explosion. Explosion of compensating capacitor banks on the power grid would be more than a high school prank, it would be a serious incident. SpinningSpark 09:04, 30 March 2011 (UTC)
White material around base of capacitor
What is the likely purpose of a hard white material placed around the base of one lead of a capacitor? This is on several but not all capacitors on a board.
I'm guessing it is either to reduce vibration or to increase resistance. I would appreciate knowing what it is for.
Thanks, Wanderer57 (talk) 00:25, 31 March 2011 (UTC)
- Hard to tell from the description. It might be a spacer, used to ensure consistent clearance under the part for board washing. But I'm speculating. --Wtshymanski (talk) 02:21, 31 March 2011 (UTC)
Capacitors for storing charge or not
Re the recent discussion in edit notes: "Capacitors don't store charge - a given capacitor has the same total charge when 'charged' as when 'uncharged'."
Probably I should explain that I'm writing this to clarify my thinking, NOT as an expert on capacitors.
When a capacitor is charged, one side has an excess of electrons and the other a comparative "shortage".
It may be true that the total charge (number of electrons) in the component is the same when charged as when uncharged, though I'm inclined to doubt that statement.
Even if it is true, it glosses over the point that excess positive charge is stored on one side (and excess negative on the other.)
Wanderer57 (talk) 21:48, 4 April 2011 (UTC)
- I would be more willing to follow what authoritiative sources say, instead of what a random anon address thinks. --Wtshymanski (talk) 22:00, 4 April 2011 (UTC)
- I agree. A capacitor stores charge: one plate stores positive charge and the other stores negative charge. Even if the phrase doesn't tell the whole story, its as good a capsule description as we're going to get, which is why it is used widely as a definition in "authoritative sources": 1, 2 3 4 5 Excessively complicated, esoteric introductory sentences are one reason people complain Wikipedia articles can only be understood by the people who wrote them. --ChetvornoTALK 01:27, 5 April 2011 (UTC)
- To reiterate: a capacitor stores charge, but then so does a wire, a brick, a human-being...anything containing charged particles. A capacitor is not for storing charge; a capacitor is for storing a certain configuration of charge - a charge separation. Compare this to a steel spring, which likewise stores steel (in that it contains steel), but is for storing steel in a specific configuration (compressed or stretched). 86.148.115.162 (talk) 05:43, 5 April 2011 (UTC)