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Electrical phenomena are commonplace and unusual events that can be observed and that illuminate the principles of the physics of electricity and are explained by them. Electrical phenomena are a somewhat arbitrary division of electromagnetic phenomena. Some examples are *Biefeld–Brown effect — Thought by the person who coined the name, Thomas Townsend Brown, to be an anti-gravity effect, it is generally attributed to electrohydrodynamics (EHD) or sometimes electro-fluid-dynamics, a counterpart to the well-known magneto-hydrodynamics. *Contact electrification — The phenomenon of electrification by contact. When two objects were touched together, sometimes the objects became spontaneously charged (οne negative charge, one positive charge). *Direct Current — (old: Galvanic Current) or "continuous current"; The continuous flow of electricity through a conductor such as a wire from high to low potential. *Electroluminescence — The phenomenon wherein a material emits light in response to an electric current passed through it, or to a strong electric field. *Electrical conduction — The movement of electrically charged particles through transmission medium. *Electric shock — Physiological reaction of a biological organism to the passage of electric current through its body. *Ferroelectric effect — The phenomenon whereby certain ionic crystals may exhibit a spontaneous dipole moment. *Inductance — The phenomenon whereby the property of a circuit by which energy is stored in the form of an electromagnetic field. *Lightning — powerful natural electrostatic discharge produced during a thunderstorm. Lightning's abrupt electric discharge is accompanied by the emission of light. *Photoconductivity — The phenomenon in which a material becomes more conductive due to the absorption of electro-magnetic radiation such as visible light, ultraviolet light, or gamma radiation. *Photoelectric effect — Emission of electrons from a surface (usually metallic) upon exposure to, and absorption of, electromagnetic radiation (such as visible light and ultraviolet radiation). *Piezoelectric effect — Ability of certain crystals to generate a voltage in response to applied mechanical stress. *Plasma — Plasma occur when gas is heated to very high temperatures and it disassociates into positive and negative changes *Pyroelectric effect — The potential created in certain materials when they are heated. *Static electricity — Class of phenomena involving the imbalanced charge present on an object, typically referring to charge with voltages of sufficient magnitude to produce visible attraction (e.g., static cling), repulsion, and sparks. *Sparks — Electrical breakdown of a medium that produces an ongoing plasma discharge, similar to the instant spark, resulting from a current flowing through normally nonconductive media such as air. *Telluric currents — Extremely low frequency electric current that occurs naturally over large underground areas at or near the surface of the Earth. *Thermoelectric effect — the Seebeck effect, the Peltier effect, and the Thomson effect *Thunderstorm — also electrical storm, form of weather characterized by the presence of lightning and its acoustic effect on the Earth's atmosphere known as thunder. *Triboelectric effect — Type of contact electrification in which objects become electrically charged after coming into contact and are then separated. *Whistlers〔(Altair's site on Natural Radio Signals )〕 — Very low frequency radio wave generated by lightning ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Electrical phenomena」の詳細全文を読む スポンサード リンク
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