Electrical phenomena

Electrical phenomena are commonplace and unusual events that can be observed which 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 —
*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).
*Electroluminescence — The phenomenon where 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.
*Galvanic current — Direct Current or "continuous current"; The continuous flow of electricity through a conductor such as a wire from high to low potential.
*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.
*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 which 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 electrical 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
*Triboelectric effect — Type of contact electrification in which objects become electrically charged after coming into contact and are then separated.
*Whistlers [ [http://www.altair.org/natradio.htm Altair's site on Natural Radio Signals] ] — Very low frequency radio wave generated by lightning

References

External articles

* [http://www.loscrittoio.it/Pages/MM-0700.html A Βeginner's Guide to Natural VLF Radio Phenomena]