All articles starting with E
17,681 articles
Electric spark
An electric spark is a sudden, transient electrical breakdown of a gas gap between electrodes, in which the gas ionizes into a luminous plasma channel carrying a burst of current.
Electric starter (motorcycle)
An electric starter on a motorcycle is a battery-powered motor that cranks the engine when the rider presses a button, replacing the kickstarter; it first appeared on a 1914 Hendee.
Electric stove
An electric stove is a kitchen appliance that cooks using electrical resistance or induction rather than burning fuel, typically combining a cooktop with an electric oven in one unit.
Electric susceptibility (χe)
Electric susceptibility (χe) is a dimensionless constant measuring how strongly a dielectric material polarizes in response to an applied electric field, related to permittivity by εr = 1 + χe.
Electric toothbrush
An electric toothbrush is a battery-powered brush with a motor-driven head that removes plaque better than a manual brush, reducing plaque by about 21% after 3 months.
Electric trolley-assist
Electric trolley-assist is a mining haulage technology in which diesel-electric haul trucks connect through pantographs to overhead lines on pit ramps, roughly doubling uphill speed while cutting diesel use.
Electric Universe
Electric Universe is a German psytrance project founded in Hamburg in 1991 by Boris Blenn and Micky Dressler, known for melodic, guitar-driven Goa and full-on trance.
Electric vehicle
An electric vehicle (EV) is a road vehicle powered by a battery and electric motor, using about 70% less energy per kilometer than a similar gasoline car.
Electric vehicle battery
An electric vehicle battery, also known as a traction battery or EV battery, is a rechargeable lithium-ion pack that supplies power to electric cars, hybrids, and plug-in hybrids.
Electric Warrior
Electric Warrior, T. Rex's second studio album under that name, released September 24, 1971 on Rhino/Reprise, produced by Tony Visconti; it topped the UK chart for six weeks and launched glam rock with "Bang A Gong (Get It On)" and "Jeepster."
Electric water boiler
An electric water boiler is an electrically powered kitchen appliance for heating drinking water, spanning electric kettles, countertop boilers and urns, instant hot-water dispensers, and plumbed-in boiling-water taps.
Electric water heater
An electric water heater is an appliance that uses electricity to heat potable water, in storage, tankless, and heat pump forms, with heat pump models roughly three times more efficient.
Electric Wiring
Electric wiring is the organized placement of conductors, cables, and related equipment to build circuits in buildings, machines, and electronics, governed in the US by the National Electrical Code.
Electric Wizard
Electric Wizard: English doom metal band formed 1993 in Dorset, England, also briefly known as Thy Grief Eternal and Eternal; name from Black Sabbath's "Electric Funeral" and "The Wizard"; landmark albums Come My Fanatics... and Dopethrone.
Electric Zoo
Electric Zoo, often shortened to EZoo, is an electronic dance music festival held over Labor Day weekend on Randall's Island in New York City, launched in 2009.
Electric-field-induced second harmonic generation spectroscopy
Electric-field-induced second harmonic generation spectroscopy (EFISHG) is a nonlinear optical technique that uses a static electric field to induce second harmonic generation in centrosymmetric materials.
Electric-field-induced superconductivity
Electric-field-induced superconductivity is the creation of superconductivity in a non-superconducting material using a gate electrode, pioneered in ZrNCl and extended in 2012 to MoS2, which turned superconducting near 9.4 K.
Electric-steam locomotive
An electric-steam locomotive either uses an on-board steam engine to generate electricity for traction motors, or draws external electricity to heat its boiler water, as in Swiss wartime conversions.
Electrica
Electrica, formally Societatea Energetica Electrica S.A., is a Romanian energy company for electricity distribution and supply, listed in Bucharest and London since 2014 and serving about 4 million customers.
Electrical balance duplexer
An electrical balance duplexer (EBD) is a four-port RF device that lets a transmitter and receiver share one antenna by canceling the transmit signal at the receiver.
Electrical ballast
An electrical ballast, also called a lamp ballast, is a device that starts gas-discharge lamps and limits their current, ranging from simple magnetic coils to electronic circuits.
Electrical breakdown
Electrical breakdown, also called dielectric breakdown, is the abrupt loss of insulating behavior when the applied electric field exceeds a critical value and a conducting path forms.
Electrical cable
An electrical cable, also called insulated cable, is an assembly of insulated conductors that carries electric power or signals, from power lines to coaxial types.
Electrical capacitance tomography
Electrical capacitance tomography (ECT), also called capacitance tomography, is a non-invasive imaging method that reconstructs permittivity inside pipes and vessels from capacitance measurements between external electrodes, used to monitor multiphase flows and fluidized beds.
Electrical cardiometry
Electrical cardiometry (EC) is a noninvasive hemodynamic monitoring method that estimates stroke volume and cardiac output continuously from changes in thoracic electrical impedance during the cardiac cycle.
Electrical cardioversion
Electrical cardioversion is a medical procedure delivering an electric shock synchronized to the heartbeat to restore normal rhythm in arrhythmias like atrial fibrillation, differing from defibrillation.
Electrical conductivity measurement
Electrical conductivity measurement is an experimental characterization method that determines how well a material conducts electric current, serving semiconductor wafer, battery, thin-film, and water-purity applications.
Electrical conductivity meter
An electrical conductivity meter, also called an EC meter, is an instrument that measures the conductivity of a liquid, reporting it in siemens per centimeter.
Electrical conductor
An electrical conductor, or conductor of electricity, is a material with mobile charged particles, such as a metal's free electrons, that lets charge flow under an applied voltage.
Electrical conduit
Electrical conduit, also called cable duct, is a raceway of tubing, fittings, and boxes that encloses and protects electrical wiring along a run, unlike open cable tray.