Talk:Electrical energy

Electric car power

Kindly give electrical and mechanical specifications motor for electric car to pull 1000Kg

Try posting your question at the Science reference desk. Also, try to be more specific. --Bmk 13:06, 17 August 2006 (UTC)

Merge

This article seems redundant with Power (physics).

Huh? You should be aware that energy and power are two different things measured in two different units. They are as different as distance is different from velocity. Also, a very large article about Electric power already exists.

How does it gathered????

A Sugn.

I suggest that it should be written in an article by

$\mathcal\, W_{e}=\frac{1}{2} \int\int_{\tau}\int \rho V d\tau \,$

where V is electric potential. Also maybe by

$\mathcal\, W_{e}=\frac{1}{2} \int\int_{\tau}\int \vec{D} \cdot \vec{E} d\tau\,$

electromagnetic energy

There seems to be a very confusing plethora of disjunct articles about electromagnetic energy. I'd like to work on unifying them and making them more consistent. For instance, it is pretty inappropriate for Electromagnetic energy to redirect to Electrical energy. I'm not even sure where to find the full equation for energy in an electromagnetic field. Any comments would be appreciated...i'll start working on it soon, after I've thought of the best way to deal with the problem. --Bmk 13:05, 17 August 2006 (UTC)

The full equation for energy in an electromagnetic field is something that you can find in any decent introductory college level physics text. (It's just the sum of the energies in the electric and magnetic fields.) --Strait 17:14, 17 August 2006 (UTC)

Sorry - what I meant was I don't know where to find it on wikipedia - I assumed it existed somewhere, but I can't find it.  :) As a matter of foolish pride, i did know the relationship between electromagnetic energy and the electromagnetic field. Thanks --Bmk 20:10, 20 August 2006 (UTC)

>For instance, it is pretty inappropriate for Electromagnetic energy to redirect to Electrical energy. Huh? Why inappropriate? Can you explain your objection in detail? For example, do you think that the "electricity" sold by utility companies is in any way different than "electromagnetic energy" composed of e-fields and b-fields? It's my understanding that "electrical energy" and "electromagnetic energy" are two different names for a single concept. I got this from my EM/Waves textbooks in engineering courses, and I've seen it in more than one physics text. For example, when a 1MHz AM radio transmitter sends energy to it's antenna via a 2-wire transmission line, the energy is entirely composed of 1MHz electromagnetic fields which surround the pair of wires. Likewise, when the electric company sends energy to your home, the energy is entirely composed of 60Hz electromagnetic fields which surround the power lines. Both are EM energy, and the only real difference is the frequency. Also, in a capacitor whenever some electrons are pulled from one plate and deposited on the other, the energy is entirely stored in the e-field between the plates (and is not stored on an individual electron.) And finally, note that electrical energy cannot flow through metal wires in the first place: the wave velocity in solid metal is extremely low, and is nothing like the large fraction of c which is the empirically determined velocity for electrical energy on a wire.

I'll restore the original more accurate phrase, unless someone can explain why I shouldn't:

• Electrical energy is also identical to the electromagnetic fields surrounding a transmission line, the fields contained in capacitors and inductors, or the fields propagating in space as electromagnetic radiation. --Wjbeaty 21:47, 27 September 2006 (UTC)

This phrase:

* the energy used by electricity

...appears to be a circular definition, since you apparently are using the word "electricity" to mean a form of energy, i.e. electrical energy. In other words, that phrase is saying "the energy used by electrical energy." In the same way, this phrase is also circular:

* Electrical energy is the amount of work that can be done by electricity.

...since you're apparently using "electricity" in the sense of electrical energy. So you're really saying "electrical energy is the amount of work that can be done by electric energy." (If I'm wrong, then please tell me which definition of "electricity" you are using. Better yet, delete the word "electricity" and replace it with a less ambiguous term.) If you don't think that "electricity" is a form of energy, then do you think that "electricity" means "electric charge?" --Wjbeaty 21:47, 27 September 2006 (UTC)

In reference to the above...

e·lec·tric·i·ty       (ĭ-lěk-trĭs'ĭ-tē, ē'lěk-)  Pronunciation Key
n.

   1.
         a. The physical phenomena arising from the behavior of electrons and protons that is caused by the attraction of particles with opposite charges and the repulsion of particles with the same charge.
         b. The physical science of such phenomena.
   2. Electric current used or regarded as a source of power.
   3. Intense, contagious emotional excitement.

(citation:)

American Psychological Association (APA):
electricity. (n.d.). The American Heritage® Dictionary of the English Language, Fourth Edition. Retrieved July 23, 2007, from Dictionary.com website: http://dictionary.reference.com/browse/electricity
Chicago Manual Style (CMS):
electricity. Dictionary.com. The American Heritage® Dictionary of the English Language, Fourth Edition. Houghton Mifflin Company, 2004. http://dictionary.reference.com/browse/electricity (accessed: July 23, 2007).
Modern Language Association (MLA):
"electricity." The American Heritage® Dictionary of the English Language, Fourth Edition. Houghton Mifflin Company, 2004. 23 Jul. 2007. <Dictionary.com http://dictionary.reference.com/browse/electricity>.

I would personally consider "electricity" here to be defined as the above definition 1-a, and the above mentioned phrase ("Electrical energy is the amount of work that can be done by electricity.") should be rewritten as:

* Electrical energy is the amount of work that can be done by interaction within a state of electricity.

...or something along those lines. ;)

Moosa17 03:42, 24 July 2007 (UTC)

Oh and a side note; please forgive my messy formatting... I find the so-called "wiki markup" quite appalling in it's lack of usability and understanding of itself... But, just know that I tried my best, and utterly wasted many minutes of my life. ;)

Moosa17 04:10, 24 July 2007 (UTC)

Irrelevant link

Why does the "Electric energy in Eastern Balkans" link appear on this page? This is meant as a scientific page more than anything else; is it not? —The preceding unsigned comment was added by 84.92.140.11 (talk) 16:48, 30 April 2007 (UTC).

Redirect

My word, this is awful. What is the point of this article, exactly? If you want to read about how wall plugs work, there's Electric power. If you want to read about physics of electric charges, there should be something in electromagnetism. Horrible prose, usual Wiki defects of descending to trivia in the opening paragraph (don't forget the absolute most important fact we would ever need to know about anything is the SI unit used to measure it) plus an intricate and patronizing discussion about the differences between "power" and "energy". A couple of old complaint tags, too. A "seamless" transition between patronizing discussion and triple integrals. Illiterate words like "electrisizing"! I'm going to change this to a disambiguation page pointing at electromagnetism and electric power. Can someone give me a one-sentence explanation of why this article should live? --Wtshymanski 15:41, 9 September 2007 (UTC) Course notes do not make good encylopedia articles, either. --Wtshymanski 16:01, 9 September 2007 (UTC)

Electric power is not electrical energy? — Omegatron 17:35, 9 September 2007 (UTC)

I need to link to this page for the fairly lucid description of the potential energy of a collection of charges. I'll be linking from Debye-Hückel equation.ChrisChiasson 10:30, 2 October 2007 (UTC)

I changed my mind, I think I am going to link to the electric potential energy article, which is actually what this article here seems to be about - perhaps they should be merged. ChrisChiasson 11:03, 2 October 2007 (UTC)