<Li> Ferroelectric effect--The phenomenon whereby certain ionic crystals may exhibit a spontaneous dipole moment . </Li> <Li> Inductance--The phenomenon whereby the property of a circuit by which energy is stored in the form of an electromagnetic field . </Li> <Li> Lightning--powerful natural electrostatic discharge produced during a thunderstorm . Lightning's abrupt electric discharge is accompanied by the emission of light . </Li> <Li> 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 . </Li>

Most electric phenomena are due to the movements of