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electrical energy

GC: n

CT: Electrical energy is the energy carried by moving electrons in an electric conductor. It cannot be seen, but it is one of our most useful forms of energy because it is relatively easy to transmit and use.
All matter consists of atoms, and every atom contains one or more electrons, which are always moving. When electrons are forced along a path in a conducting substance such as a wire, the result is energy called electricity.
Electrical generating plants do not create energy. They change other forms of energy into electricity. For example, power plants can convert chemical energy stored in fuels into thermal energy, which evaporates water into steam, which produces mechanical energy as it moves through turbines. The turbines spin generators, which produce electricity.

S: http://www.energyeducation.tx.gov/energy/section_1/topics/forms_of_energy/electrical_energy.html(external link) (last access: 10 February 2015)

N: 1. electrical (adj): 1630s, "giving off electricity when rubbed," from electric + -al. Meaning "relating to electricity, run by electricity" is from 1746. Related: Electrically.
energy (n): 1590s, "force of expression," from Middle French énergie (16c.), from Late Latin energia, from Greek energeia "activity, action, operation," from energos "active, working," from en "at" + ergon "work, that which is wrought; business; action".
Used by Aristotle with a sense of "actuality, reality, existence" (opposed to "potential") but this was misunderstood in Late Latin and afterward as "force of expression," as the power which calls up realistic mental pictures. Broader meaning of "power" in English is first recorded 1660s. Scientific use is from 1807. Energy crisis first attested 1970.
2. Electrical energy: Matter is made up of atoms. In these atoms, there are some even small stuff called electrons that are constantly moving. The movement of these electrons depend on how much energy is has. This means every object has potential energy, even though some have more than others.
Humans can force these moving electrons along a path from one place to the other. There are special mediums (materials) called conductors, that carry this energy. Some materials cannot carry energy in this form, and they are called insulators. We generate electrical energy whey we succeed to cause the these electrons to move from one atom to the other, with the use of magnetic forces.

S: 1. OED - http://www.etymonline.com/index.php?allowed_in_frame=0&search=electrical+energy&searchmode=none(external link) (last access: 10 February 2015). 2. http://www.eschooltoday.com/energy/kinds-of-energy/what-is-electrical-energy.html(external link) (last access: 11 February 2015).

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CR: electricity, electric power station, electrolyser, electromagnetic wave, energy poverty, hybrid car, hydraulic energy, hydroelectric power, resistivity, tungsten.


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