2. Using, providing, producing, transmitting, or operated by electricity.
3. Related to or associated with electricity, but not containing it or having its properties or characteristics.
Examples include electrical engineer, electrical handbook, and electrical rating.
4. Of or relating to the science or technology of electricity.The term electrical is used in a general sense, often to refer to the use of electricity as a whole as opposed to other forms of energy; for example, electrical engineering or an electrical appliance.
Electrical conductors are used to conduct electric current, as in the metal wires of an electric circuit.
Electrical conductors are usually metallic while thermal conductors allow thermal energy to flow because they do not absorb radiant heat and they include materials; such as, metal and glass.
It is made up of ions of one charge type which are fixed to the surface of the solid and an equal number of mobile ions of the opposite charge which are distributed through the neighboring region of the liquid.
2. The area of a charge separation formed when an electrode meets an ionic conductor.A metal electrode in a water solution forms a specific structure consisting of the metal surface itself, an adjoining layer of adsorbed (adhesion to the surfaces of solids) water molecules and ions, and an outer region of oppositely charged ions diffused in the liquid.
This causes an electric field of considerable intensity.
3. An interfacial region, near the boundary between two different phases of a substance, in which physical properties change significantly.4. A structure that appears on the surface of a charged object when it is placed into a liquid.
This object might be a solid particle, a gas bubble, a liquid droplet, or a porous body.
2. An angle that specifies a particular instant in an alternating-current (AC) cycle or expresses the phase difference between two alternating quantities which is usually expressed in electrical degrees.
The phase difference between two alternating quantities is expressed as an electrical angle.
2. The x axis in a quartz crystal where there are three such axes in a crystal, each parallel to one pair of opposite sides of the hexagon.
All pass through and are perpendicular to the optical or z axis.
3. In electrocardiographic work, it is the direction of the electrical forces in the heart at a given moment in the cardiac cycle.2. A large, usually abrupt, rise in electric current in the presence of a small increase in electric voltage.
Breakdown may be intentional and controlled or it may be accidental; for example, lightning is the most familiar example of a breakdown.
The measured quantities of heat are added electrically to the sample and the temperature rise is noted.
2. The point approximately midway between the ends of an inductor or resistor which divides the inductor or resistor into two equal electrical values.
2. A systematic body of rules governing the practical application and installation of electrically operated equipment and electric wiring systems.
Made of two plates separated by a thin insulator or sometimes air, when one plate is charged negative and the other positive, a charge builds up and remains after the current is removed.
When electric power is required, the circuit is switched to conduct current between the plates, and the electrical charge is released.
2. An electronic component that stores an electric charge and releases it when required.It comes in a huge variety of sizes and types for use in regulating power as well as for conditioning, smoothing, and isolating signals.
Capacitors are made from many different materials, and just about every electrical and electronic system uses them.
2. The real part of the admittance of a circuit; when the impedance contains no re-actance, as in a direct-current circuit, it is the reciprocal of resistance, and so it is a measure of the ability of the circuit to conduct electricity.
2. The passage of electric charges because of a force exerted on them by an electric field.
Conductivity is the measure of the ability of a conductor to carry electric current and it is defined as the ratio of the amount of charge passing through unit area of the conductor (perpendicular to the current direction) per second divided by the electric field intensity (the force on a unit charge).
Conductivity is the reciprocal of resistivity and it is therefore commonly expressed in units of siemens per meter.
2. The ability of a material to conduct electricity.
Metals are usually good conductors and nonmetals are poor conductors.
3. The measure of a material's ability to carry an electric current.An electric conductor is a material that, when placed between terminals having a difference of electrical potential, will readily permit the passage of an electric current.
Different materials have different degrees of conductivity, and their effectiveness is computed as the conductivity.
The best conductors are the metals; such as, silver, copper, aluminum, platinum, and mercury; however, nonmetallic substances: such as, carbon, saline solutions, and moist earth are also sufficiently conductive so that such properties are significant in certain situations.
Because of their cost and conductivity characteristics, copper and aluminum are widely used as conductors.
Copper is used more often than aluminum and its use is preferred for high-voltage transmission than aluminum, because of its lighter weight is a definite advantage.
Steel as a conductor is inferior to the other two materials mentioned; however its greater strength and resistance to wear have led to its choice as a conductor for special purposes; such as, that of power rail services on electrified railways, and as an inner core of copper or aluminum cables.
2. The distance between two points, expressed in terms of the duration of the travel of an electromagnetic wave in a free space between the two points.
2. The energy inherent in a circuit because of its position in relation to a magnetic field.
2. An engineer whose training includes a degree in electrical engineering from an accredited college or university, or someone who has comparable knowledge and experience, to prepare him or her for maintaining the generation, transmission, and utilization of electric energy.
3. A trained specialist in electrical systems, especially those which power and control machines or are involved in communications.
2. A division of engineering concerned with the practical applications of electricity in all its forms, including those of electronics.
Electrical engineering is concerned with electric light, power systems, and devices.
Electronics engineering is concerned with wire and radio communication, the stored-program electronic computer, radar, and automatic control systems.
3. A branch of engineering which focuses on the design, the construction, and the operation of electrical systems, devices, and equipment.The founders of electrical science were physicists and mathematicians; such as, Ampere, Faraday, Gauss, and Maxwell, whose theories eventually led to the electric motor and the incandescent lamp.
Access to local motive power without steam or waterwheels and light without flames created a new industry as well as a new profession.
With the introduction of the vacuum-tube and transistor, electronics, the behavior of the electron in vacuum and in solids, joined the field as electronic engineering, and the pertinent U.S. professional society is known as the Institute of Electrical and Electronics Engineers or IEEE.
The common theme is always electricity, the electron, and James Clark Maxwell's wave equation even with the inclusion of newer power systems starting with communications, computers, and optical devices; such as, the laser and the camcorder.
James Maxwell (1831-1879) was a Scottish physicist who was best known for his work with electricity and magnetism.
Sally went outside to take care of her flowers one morning when a sudden explosion took place in her kitchen because of some kind of electrical faults in her refrigerator that resulted in a severe fire in her apartment.
The year was 1831 and the man was a 39-year-old British scientist, Michael Faraday (1791-1867).
A hat trick refers to three consecutive successes in a game or another endeavor; for example, taking three wickets with three successive deliveries by a bowler in a game of cricket, three goals or points won by a player in a game of soccer, ice hockey, etc.; therefore, sometimes, a threefold feat or success in some other activity including this example of three-electrical achievements all of which were accomplished in one year.
2. The opposition which a circuit presents to electric current.
The impedance includes both resistance and reactance.
Resistance results from collisions of the current-carrying charged particles with the internal structure of the conductor while reactance is an additional opposition to the movement of an electric charge that comes from the changing electric and magnetic fields in circuits that carry alternating current.
Two energy sources, pulsed light and pulsed electrical fields offer food processors and packagers weapons to combat contamination and extend product shelf life.
Unlike hydrogen peroxide, pulsed light and electrical fields leave no chemical residues.
Unlike heat sterilization or pasteurization, these energies have little if any negative effect on product, taste, texture, color, or nutrient content of the food.
Electric insulation is generally an important element in both the technical and economic applications of complex power and electronic systems.
Interference can be seen in both the sound waves and the electromagnetic waves; especially, those of visible light and radio.
2. A recorded measurement of the conductivities and resistivities down the length of an uncased borehole.
It provides a complete record of the formations penetrated.
It is used for geological correlations of the strata and evaluations of the possibly productive horizons.
2. The noise generated by electrical devices; for example, motors, engine ignition, power lines, etc.
2. An experimental electrical device for delivering medications transdermally.
The difference between this and conventional transdermal patches is that the slight electric current used in electrical patches will allow larger molecules to be transported through the skin.
2. Energy which is possessed by electric charges because of their positions in an electrostatic field.
Although pneumatic and mechanical transducers are commonly used, electrical measurement of pressure is often preferred because of a need for long-distance transmission, higher accuracy requirements, more favorable economics, or quicker responses.
Electrical pressure transducers may be classified depending on the operating principle as resistive transducers, strain gages, magnetic transducers, crystal transducers, capacitive transducers, or resonant transducers.
2. Properties of a substance that determine its response to an electric field; such as, its dielectric constant or conductivity.
The term dielectric refers to insulating material or a very poor conductor of electric current; and therefore, useful as an insulator.
2. The difficulty electrons have moving through a conductor or substance.
3. The opposition to the flow of electrical current between two points of a circuit.
2. Temperature sensors that exploit the predictable change in electrical resistance of some materials with changing temperatures.
2. The ability of a material to resist or to inhibit the flow of an electrical current, measured in ohm-meters.
3. A measure of how strongly a material opposes the flow of electric current.
2. One of the three basic passive components of an electric circuit that displays a voltage drop across its terminals and produces heat when an electric current passes through it.
3. A device designed to have a definite amount of resistance.
It is used in circuits to limit current flow or to provide a voltage drop.
2. Scanning in which an electron beam, controlled by electric or magnetic fields, is swept over the area under examination, in contrast to mechanical or electromechanical scanning.
3. In telecommunications, the technique of scanning a surface to reproduce or to transmit a picture.
4. In facsimile, a method of scanning in which the motion of the scanning spot is completely controlled by electronic procedures.
2. An infrequent disturbance of the electric field in the lower atmosphere caused by strong winds and the blowing of dust, but without thunderstorm activity.
3. Any meteorological disturbance in which the air is highly charged with electricity, occurring in fine weather, without clouds or rain, and often accompanied by dry, dusty winds.
4. A sudden change in the pattern of earth currents, causing interference with radio reception.
5. A meteorological condition marked by an intense electric field within a cloud or clouds.
2. The electronic symbol is a pictogram that is used to represent the various electrical and electronic devices; such as, batteries, wires, resistors, and transistors as shown in a schematic diagram of an electrical or electronic circuit.
2. All of the conductors and electricity that use devices which are connected to a source of electromotive force or generator.
3. The equipment in a motor vehicle that provides electricity to start the engine and to ignite the fuel, to operate the lights, the windshield wipers, the heater, the air conditioner, and the radio.
It is used to cover joints in insulated wires or cables.
2. A thermometer that uses thermoelectric current to measure temperature.
3. An instrument which utilizes an electrical means to measure temperature; such as, a thermocouple or resistance thermometer.
4. A thermometer indicating temperature variations by means of electrical current flowing through a circuit in which a galvanometer is inserted.
The sensitive element can be an electrical resistance whose value changes with temperature, or a thermocouple (formed by two soldered metals), which also generates specific quantities of current at different temperatures.
2. The vertical measure between the surface of an ocean current and an isokinetic point having a value of about one-tenth the surface speed.
2. A radio broadcast from a phonograph record or the phonograph record itself.
3. A radio program broadcast from a special phonograph record or tape recording or the recording itself.
When radio stations first started to record programs, they recorded on "electrical transcription disks".
2. A standard reference position from which rotor angles are measured in synchros and other rotating instruments.
Synchros consist of several devices which are used for transmitting and receiving angular positions or angular motions over wires; such as, synchro transmitters or synchro receivers.
There would be no electrical equipment, no electronic devices, and there would certainly be no computers to transmit information such as is being done here.
2. A process by which materials that conduct electricity can be removed from a metal by an electric spark.
It is used to form holes with different shapes in materials that have poor machine operations.
It is used as a guide for governmental bodies whose responsibilities are to regulate building codes.
These standards refer to the operating characteristics, terminology, basic dimensions, ratings, and testing of products that are used in utility, medical imaging, industrial, commercial, institutional, and residential applications.
It might be caused by the uncoupling of ventricular muscle contraction from electrical activity or it might be a result of cardiac damage with respiratory failure and cessation of cardiac venous return.
2. A method of pain control with the application of electric impulses to the nerve endings.
This is done through electrodes which are placed on the skin and attached to a stimulator with flexible wires.
The electric impulses which are generated are similar to those of the body; however, they are different enough to block the transmission of pain signals to the brain making this procedure noninvasive and nonaddictive, and with no known side effects.
- They work with power generation and transmission; machinery controls; lighting and wiring for buildings, automobiles, and aircraft; computers; radar; communications equipment; missile guidance systems; and consumer goods; such as, television sets and appliances.
- They may specialize in communications, computers, or power distribution equipment, or in a subdivision; such as, aviation electronic systems or in the research, development, and design of new products.
The units on a multimeter include direct current volts (DCV), alternating current volts (ACV), ohms (?), and direct current milliamps (DCmA).
The 1984 and later editions of the NEC contain Article 690, "Solar Photovoltaic Systems" which should be followed when installing a PV system.