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Static electricity is an imbalance of electric charges within or on the surface of a material. The charge remains until it can move away by an electric current or electrical discharge . The word "static" is used to differentiate it from current electricity , where an electric charge flows through an electrical conductor .
Air moving past an aircraft can lead to a buildup of charge called "precipitation static" or "P-static"; aircraft typically have one or more static wicks to remove it. [143] Checking the status of these is a standard task for pilots. [144] Similarly, helicopter blades move fast, and tribocharging can generate voltages up to 200 kV. [145]
Electrostatic discharge (ESD) is a sudden and momentary flow of electric current between two differently-charged objects when brought close together or when the dielectric between them breaks down, often creating a visible spark associated with the static electricity between the objects.
Static site generators are applications that compile static websites - typically populating HTML templates in a predefined folder and file structure, with content supplied in a format such as Markdown or AsciiDoc. Examples of static site generators include: Ruby programming language: Jekyll (powers GitHub Pages) Middleman; Go programming ...
Static electricity, a net charge of an object . Triboelectric effect, due to frictional contact between different materials; Static spacetime, a spacetime having a global, non-vanishing, timelike Killing vector field which is irrotational
Static discharge is of particular concern in the electronics industry, where it can instantly destroy components and circuitry. Equipment inside any cleanroom is designed to generate minimal air contamination.
Also called static noise, it is caused by lightning discharges in thunderstorms and other electrical disturbances occurring in nature, such as corona discharge. Industrial noise Sources such as automobiles, aircraft, ignition electric motors and switching gear, High voltage wires and fluorescent lamps cause industrial noise. These noises are ...
At least one author takes a different approach in order to avoid a need for the expression freestream static pressure. Gracey has written "The static pressure is the atmospheric pressure at the flight level of the aircraft". [15] [16] Gracey then refers to the air pressure at any point close to the aircraft as the local static pressure.