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  2. Sources of electrical energy - Wikipedia

    en.wikipedia.org/wiki/Sources_of_electrical_energy

    Light: Energy produced by light being absorbed by photoelectric cells, or solar power. Chemical: Energy produced by chemical reaction in a voltaic cell, such as an electric battery. Pressure: Energy produced by compressing or decompressing specific crystals. Magnetism: Energy produced in a conductor that cuts or is cut by magnetic lines of ...

  3. Natural gas - Wikipedia

    en.wikipedia.org/wiki/Natural_gas

    Natural gas burning on a gas stove Burning of natural gas coming out of the ground. Natural gas (also called fossil gas, methane gas, or simply gas) is a naturally occurring mixture of gaseous hydrocarbons consisting primarily of methane (95%) [1] in addition to various smaller amounts of other higher alkanes.

  4. Electricity - Wikipedia

    en.wikipedia.org/wiki/Electricity

    Electric current can flow through some things, electrical conductors, but will not flow through an electrical insulator. [ 42 ] By historical convention, a positive current is defined as having the same direction of flow as any positive charge it contains, or to flow from the most positive part of a circuit to the most negative part.

  5. Electric current - Wikipedia

    en.wikipedia.org/wiki/Electric_current

    The breakdown process forms a plasma that contains enough mobile electrons and positive ions to make it an electrical conductor. In the process, it forms a light emitting conductive path, such as a spark, arc or lightning. Plasma is the state of matter where some of the electrons in a gas are stripped or "ionized" from their molecules or atoms.

  6. Gas lighting - Wikipedia

    en.wikipedia.org/wiki/Gas_lighting

    Gas lighting in the historical center of Wrocław, Poland, is manually turned off and on daily.. Gas lighting is the production of artificial light from combustion of a fuel gas such as methane, propane, butane, acetylene, ethylene, hydrogen, carbon monoxide, coal gas (town gas) or natural gas.

  7. Plasma (physics) - Wikipedia

    en.wikipedia.org/wiki/Plasma_(physics)

    Langmuir also introduced the term "plasma" as a description of ionized gas in 1928: [12] Except near the electrodes, where there are sheaths containing very few electrons, the ionized gas contains ions and electrons in about equal numbers so that the resultant space charge is very small.

  8. Énergir - Wikipedia

    en.wikipedia.org/wiki/Énergir

    The main natural gas distributor in Québec was created during the first nationalization of electricity in Québec, in 1944. By bringing Montreal Light, Heat and Power under state control, the new Quebec Hydroelectric Commission, better known as Hydro-Québec, not only took charge of the company's electricity assets, and also acquired a gas distribution network in Greater Montreal.

  9. Electrical conductor - Wikipedia

    en.wikipedia.org/wiki/Electrical_conductor

    where is the length of the conductor, measured in metres [m], A is the cross-section area of the conductor measured in square metres [m 2], σ is the electrical conductivity measured in siemens per meter (S·m −1), and ρ is the electrical resistivity (also called specific electrical resistance) of the material, measured in ohm-metres (Ω·m ...