PowerPedia:Electrical energy
From PESWiki
Electrical energy refers to several closely related things. It can include the energy stored in an electric field, the potential energy of a charged particle in an electric field, and the energy used by electricity. In these cases, the SI unit of electrical energy is the joule. The unit used by many electrical utility companies is the watt-hour (Wh) or the kilowatt-hour (kWh).
| Table of contents |
Electric description
Electrical energy is the amount of work that can be done by electricity. Electrical energy is related to the position of an electric charge in an electric field. The electric potential energy of a charge Q situated at an electric potential V is equal to the product QV. The same expression gives the energy transformed when the charge moves through the potential difference V. The energy per unit volume of the electric field is:
where ε is the permittivity of the medium and E is the electric field vector.
Usage note
Frequently, the terms electrical energy and electric power are used interchangeably. However, in physics, and electrical engineering, "energy" and "power" have different meanings. Power is energy per unit time. In other words, the phrases "flow of power," and "consume a quantity of electric power" are both incorrect and should be changed to "flow of energy" and "consume a quantity of electrical energy."
Related concepts
References and external articles
| G Web | Sites on Electrical energy (http://www.google.com/search?svnum=50&hl=en&lr=&safe=off&sa=N&tab=wi&q=Electrical+energy) via Google Search |
| G Image | Images of Electrical energy (http://www.google.com/images?svnum=50&hl=en&lr=&safe=off&sa=N&tab=wi&q=Electrical+energy) via Google Image |
| G groups | Newsgroups with Electrical energy (http://groups.google.com/groups?svnum=50&hl=en&lr=&safe=off&sa=N&tab=wi&q=Electrical+energy) via Google Groups |
| G News | News of Electrical energy (http://news.google.com/news?svnum=50&hl=en&lr=&safe=off&sa=N&tab=wi&q=Electrical+energy) via Google News |
- news://sci.physics
- news://alt.engineering.electrical
- news://sci.electronics.basics
- Wikipedia contributors (http://en.wikipedia.org/wiki/Special:Recentchanges), Wikipedia: The Free Encyclopedia. Wikimedia Foundation. <http://en.wikipedia.org>.
- Electrical Energy (http://www.uvi.edu/Physics/SCI3xxWeb/Energy/ElectricalEnergy.html) : Electrical energy is the primary source of energy consumption.
See also
- PowerPedia main index
- PESWiki home page
- PES Network, Inc. (http:pureenergysystems.com)
