electro-, electr-, electri-

(Greek > Latin: electric, electricity; from amber, resembling amber, generated from amber which when rubbed vigorously [as by friction], produced the effect of static electricity)

Electronics in our lives consists of numerous tools

Equipment which we use everyday relies on electronics to function including calculators, car controls, cameras, washing machines, medical scanners, mobile telephones, radar systems, computers; as well as many other applications or devices which are listed in this unit.

1. The use of electric power to shape an object or to remove material from a workpiece.
2. The application of electric or ultrasonic energy to a workpiece to effect the removal of material.

One of the advantages of this production technique is that very complicated shapes can be produced with a single operation from very hard alloys that would be very difficult, if not impossible, to machine with any other metal cutting technique.

1. A temporary magnet made by coiling wire around an iron core; when current flows in the coil the iron becomes a magnet.
2. A magnet consisting of a core, often made of soft iron, that is temporarily magnetized by an electric current flowing through a coil that surrounds it.
3. A coil of wire usually wound on a soft iron or steel core.

When current is passed through the coil a magnetic field is generated and the core provides an easy path for the magnetic lines of force. This concentrates the electric field in the core.

1. Created by or relating to electromagnetism; that is, the interaction of electricity and magnetism.
2. Involving or relating the interaction of electric and magnetic fields, both static and dynamic.
3. A reference to magnetism that is induced by an electric current.
4. Pertaining to radiation; such as, light, microwaves, X-rays, gamma rays, or radio waves.
5. Referring to the combined electric and magnetic fields associated with radiation or movements of electrons or other charged particles through conductors or space.
Electromagnetic Aircraft Launch System, EMALS
An electromagnetic system is a technology which is intended to replace the steam catapults that have been used on aircraft carriers since the mid-1950's.

The Navy plans to install the Electromagnetic Aircraft Launch System on the USS Gerald R. Ford, a next-generation aircraft carrier scheduled to go into service in 2015.

The Electromagnetic Aircraft Launch System technology is designed to handle newer, heavier, and faster aircraft than the traditional steam catapults, the Navy says.

The Navy says EMALS will provide "higher launch energy capacity;" improvements in system weight, maintenance, and efficiency; and greater accuracy of end-speed control and smooth acceleration at both high and low speeds".

The Electromagnetic Aircraft Launch System is a multimegawatt electric power system involving generators, energy storage, power conversion, a 100,000 hp electric motor, and an advanced technology closed loop control system with diagnostic health monitoring.

This technology reduces stress on airframes because they can be accelerated more gradually to a takeoff speed than steam-powered catapults.

—Compiled from information located in a
"News Release" by the Naval Air Systems Command;
Patuxent River, Maryland; December 20, 2010.
electromagnetic amplifying lens (s) (noun), electromagnetic amplifying lenses (pl)
A system composed of several waveguides that are symmetrically arranged with a related excitation medium in order to become excited with equal amplitudes and phases to in order to provide a net gain in energy.
electromagnetic balance
An instrument for measuring electromagnetic forces by balancing them against gravity.
electromagnetic cathode ray tube, electromagnetic cathode-ray tube
1. A cathode ray tube in which the beam of electrons produced in the tube's filament is deflected by a magnetic field.
2. A cathode-ray tube in which electromagnetic deflection is used on the electron beam.
electromagnetic clutch
1. A friction clutch that operates by the action of electric power from a dynamo on a magnetic coupling between conductors.
2. A clutch based on magnetic coupling between conductors; such as, a magnetic fluid and power clutch, an eddy-current clutch, or a hysteresis clutch.

Electromagnetic clutches operate electrically, but they transmit torque mechanically.

electromagnetic communication, wireless communication
The use of an electromagnetic wave to pass information between two points.
electromagnetic compatibility, EMC
1. The extent to which a piece of hardware will tolerate electrical interference from other equipment, and will interfere with other equipment.
2. The capability of electronic equipment or systems to be operated in the intended electromagnetic environment at design levels of efficiency.
3. The ability of electronic equipment and systems to operate in the proximity of electromechanical devices, without causing or suffering unacceptable degradation in output or performance.
4. The capacity of an appliance or circuit to function correctly in its intended electromagnetic environment without transmitting unwanted signals to adjacent equipment or receiving unwanted interference from nearby sources.
electromagnetic complex
1. An electromagnetic configuration of an installation that includes all radiators of significant amounts of energy.
2. Electromagnetic configuration of an installation, including all significant radiators of energy.
electromagnetic constant
1. All electromagnetic radiation, including light, radio transmission and electricity, travels at approximately 186,000 miles (300,000 kilometers) per second; more than seven times around the equator in one second. More precisely, the speed is 299,792,458 meters per second in a vacuum.
2. The speed of the propagation of electromagnetic waves in a vacuum.
electromagnetic coupling
1. A coupling between circuits or conductors that are mutually affected by the same electromagnetic field.
2. A coupling that exists between circuits when they are mutually affected by the same electromagnetic field.
electromagnetic crack detector
An instrument that detects cracks in iron or steel objects by applying a strong magnetizing force and measuring the resulting magnetic flux through the object.

When a flawed portion passes through the magnetizing coil, the magnetic flux drops.

electromagnetic current
1. A movement of charged particles in the atmosphere giving rise to electric and magnetic fields; such as, those in the ionosphere that transmit radio signals.
2. Motions of charged particles; for example, in the ionosphere, that are giving rise to electric and magnetic fields.

The references or sources of information for compiling the words and definitions in this unit are listed at this Electronic Bibliography page or specific sources are indicated when they are appropriate.

A cross reference of word units that are related, directly and/or indirectly, with "electricity": galvano-; hodo-; ion-; piezo-; -tron; volt; biomechatronics, info; mechatronics, info.